INTERNATIONAL EQUITY FUND - Class F Prospectus EMERGING MARKETS EQUITY FUND - Class F Prospectus INTERNATIONAL FIXED INCOME FUND - Class F Prospectus EMERGING MARKETS DEBT FUND - Class F Prospectus INTERNATIONAL EQUITY FUND - Class I Prospectus INTERNATIONAL EQUITY FUND - Class Y Prospectus EMERGING MARKETS EQUITY FUND - Class Y Prospectus INTERNATIONAL FIXED INCOME FUND - Class Y Prospectus EMERGING MARKETS DEBT FUND - Class Y Prospectus SIT INTERNATIONAL EQUITY FUND SIT EMERGING MARKETS EQUITY FUND SIT INTERNATIONAL FIXED INCOME FUND SIT EMERGING MARKETS DEBT FUND SIT INTERNATIONAL EQUITY FUND - CLASS F, effective 1-31-2017 (formerly Class A) SIT EMERGING MARKETS EQUITY FUND - CLASS F, effective 1-31-2017 (formerly Class A) SIT INTERNATIONAL FIXED INCOME FUND - CLASS F, effective 1-31-2017 (formerly Class A) SIT EMERGING MARKETS DEBT FUND - CLASS F, effective 1-31-2017 (formerly Class A) SIT INTERNATIONAL EQUITY FUND - CLASS I Class Y Class Y Class Y Class Y Market Risk [Member] Foreign Investment/Emerging Markets Risk [Member] Country Concentration Risk [Member] Risk of Investing in China [Member] Investment Style Risk [Member] Non-Diversified Risk [Member] Duration Risk [Member] Corporate Fixed Income Securities Risk [Member] Currency Risk [Member] Asset-Backed Securities Risk [Member] Below Investment Grade Securities (Junk Bonds) Risk [Member] Small and Medium Capitalization Risk [Member] Depositary Receipts Risk [Member] Preferred Stock Risk [Member] Participation Notes (P-Notes) Risk [Member] Warrants Risk [Member] Derivatives Risk [Member] Long/Short Risk [Member] Foreign Sovereign Debt Securities Risk [Member] Leverage Risk [Member] Structured Securities Risk [Member] Liquidity Risk [Member] U.S. Government Securities Risk [Member] Bank Loans Risk [Member] Mortgage-Backed Securities Risk [Member] Extension Risk [Member] Exchange-Traded Funds (ETFs) Risk [Member] Portfolio Turnover Risk [Member] Interest Rate Risk [Member] Credit Risk [Member] Prepayment Risk [Member] MSCI ACWI ex-USA Index (net) (reflects no deduction for fees or expenses) MSCI EAFE Index Return (net) (reflects no deduction for fees or expenses) MSCI Emerging Markets Index Return (net) (reflects no deduction for fees or expenses) Bloomberg Global Aggregate Index (reflects no deduction for fees, expenses or taxes) Bloomberg Global Aggregate ex-US Index, Hedged Return (reflects no deduction for fees, expenses or taxes) J.P. Morgan EMBI Global Diversified Index Return (reflects no deduction for fees, expenses or taxes) The Fund's Blended Benchmark Return (reflects no deduction for fees, expenses or taxes) doc_ INTERNATIONAL_ EQUITY_ FUND_ Class_ I_ Prospectus Member S000006420 Member C000017609 Member Long Short Risk Member Asset Backed Securities Risk Member Investment Style Risk Member CreditRiskMember doc_ EMERGING_ MARKETS_ EQUITY_ FUND_ Class_ Y_ Prospectus Member USGovernment Securities Risk Member doc_ EMERGING_ MARKETS_ DEBT_ FUND_ Class_ F_ Prospectus Member Corporate Fixed Income Securities Risk Member C000147408 Member index_ The_ Funds_ Blended_ Benchmark_ Return_reflects_no_deduction_for_fees_expenses_or_taxes Member index_ MSCI_ ACWI_ex USA_ Index_net_reflects_no_deduction_for_fees_or_expenses Member C000017606 Member Bank Loans Risk Member Below Investment Grade Securities Junk Bonds Risk Member C000147410 Member index_ Bloomberg_ Global_ Aggregate_ Index_reflects_no_deduction_for_fees_expenses_or_taxes Member doc_ EMERGING_ MARKETS_ EQUITY_ FUND_ Class_ F_ Prospectus Member Exchange Traded Funds ETFs Risk Member doc_ EMERGING_ MARKETS_ DEBT_ FUND_ Class_ Y_ Prospectus Member Portfolio Turnover Risk Member Currency Risk Member C000017608 Member Country Concentration Risk Member Non Diversified Risk Member Derivatives Risk Member doc_ INTERNATIONAL_ EQUITY_ FUND_ Class_ Y_ Prospectus Member PrepaymentRiskMember C000147409 Member C000017610 Member Mortgage Backed Securities Risk Member doc_ INTERNATIONAL_ FIXED_ INCOME_ FUND_ Class_ Y_ Prospectus Member Foreign Investment Emerging Markets Risk Member Risk Of Investing In China Member doc_ INTERNATIONAL_ FIXED_ INCOME_ FUND_ Class_ F_ Prospectus Member Preferred Stock Risk Member S000006418 Member doc_ INTERNATIONAL_ EQUITY_ FUND_ Class_ F_ Prospectus Member index_ MSCI_ EAFE_ Index_ Return_net_reflects_no_deduction_for_fees_or_expenses Member index_ JP_ Morgan_ EMBI_ Global_ Diversified_ Index_ Return_reflects_no_deduction_for_fees_expenses_or_taxes Member Liquidity Risk Member Small And Medium Capitalization Risk Member Foreign Sovereign Debt Securities Risk Member Market Risk Member Extension Risk Member Leverage Risk Member Structured Securities Risk Member index_ MSCI_ Emerging_ Markets_ Index_ Return_net_reflects_no_deduction_for_fees_or_expenses Member S000006421 Member InterestRateRiskMember index_ Bloomberg_ Global_ Aggregate_ex US_ Index_ Hedged_ Return_reflects_no_deduction_for_fees_expenses_or_taxes Member Warrants Risk Member Participation Notes PNotes Risk Member S000006419 Member Depositary Receipts Risk Member C000017607 Member C000147407 Member Duration Risk Member