AMG GW&K High Yield Bond SMA Shares S000105396 [Member] C000276156 [Member] Interest Rate Risk [Member] Market Risks [Member] Liquidity Risk [Member] Debt Securities Risk [Member] Bank Loan Risk [Member] Changing Distribution Level Risk [Member] Credit and Counterparty Risk [Member] Derivatives Risks [Member] Exchange Traded Fund Risk [Member] Extension Risk [Member] Foreign Investment Risk [Member] Inflation Deflation Risk [Member] Leverage Risk [Member] Management Risk [Member] Municipal Market Risk [Member] New Fund Risk [Member] Preferred Securities Risk [Member] Prepayment Risk [Member] Reinvestment Risk [Member] Restricted Securities Risk [Member] U S Government Securities Risk [Member] High Yield Risk [Member]