0001297989 2019-12-31 2019-12-31 false 0001297989 8-K 2019-12-31 EXLSERVICE HOLDINGS, INC. DE 001-33089 82-0572194 320 Park Avenue, 29th Floor, 10022 New York, NY 212 277-7100 false false false false false Common Stock, $0.001 par value per share EXLS NASDAQ