Diamond Hill Short Duration Income Fund Class A Class C Class I Class Y Asset-Backed, Mortgage-Related and Mortgage-Backed Securities Risk Consumer Loans Risk Credit Risk [Member] Current Market Environment Risk Government Securities Risk High Yield Securities Risk Inflation Risk Interest Rate Risk [Member] Liquidity Risk Management Risk Market Risk Non-U.S. and Emerging Markets Risk Prepayment and Call Risk Bloomberg US Aggregate Bond Index Bloomberg 1-3 Year US Government/Credit Index Diamond Hill Core Bond Fund Class A Class C Class I Class Y Bloomberg US Aggregate Bond Index C000173086Member C000280589Member C000173087Member C000173088Member Index3Member