Other Assets less Liabilities [Member] Unimicron Technology Corp Taiwan [Member] HD Hyundai Heavy Industries Co Ltd South Korea [Member] Murata Manufacturing Co Ltd Japan [Member] Elite Material Co Ltd Taiwan [Member] Accton Technology Corp Taiwan [Member] SK hynix Inc South Korea [Member] MediaTek Inc Taiwan [Member] Delta Electronics Inc Taiwan [Member] Taiwan Semiconductor Manufacturing Co Ltd Taiwan [Member] Samsung Electronics Co Ltd South Korea [Member] C000027306 [Member] Class I C000027305 [Member] Class N Healthcare Sector [Member] Financial Services Sector [Member] Short-Term Investments [Member] THAILAND TAIWAN KOREA, REPUBLIC OF JAPAN INDIA CHINA AUSTRALIA Municipal Bonds [Member] US Government Corporations and Agencies Securities [Member] Asset-Backed Securities [Member] Collateralized Mortgage-Backed Securities [Member] C000027310 [Member] C000125498 [Member] Government And Agency [Member] AAA [Member] AA [Member] A [Member] BBB [Member] BB [Member] B [Member] Not Rated [Member] Corporate Bonds and Notes [Member] U S Treasury Bonds 2 250 05 15 41 [Member] U S Treasury Bonds 3 125 05 15 48 [Member] FNMA 3 500 08 01 49 [Member] FNMA 3 500 02 01 47 [Member] FNMA 3 500 02 01 35 [Member] FNMA 4 000 06 01 48 [Member] U S Treasury Bonds 3 625 02 15 53 [Member] FNMA 5 500 11 01 52 [Member] FNMA 4 000 07 01 44 [Member] FHLMC 3 000 11 01 49 [Member] Investment Type [Axis] Net Assets Investment Company Portfolio Turnover No Trading Symbol Flag