Earnings Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Numerators:
Net income	$ 51,331	$ 36,178
Denominators:
Basic weighted average common shares outstanding (in shares)	33,439,564	33,442,038
Dilutive effect of share based awards (in shares)	491,916	452,830
Diluted (in shares)	33,931,480	33,894,868
Earnings per share attributable to ExlService Holdings, Inc. stockholders:
Basic (in dollars per share)	$ 1.54	$ 1.08
Diluted (in dollars per share)	$ 1.51	$ 1.07
Weighted average potentially dilutive shares considered anti-dilutive and not included in computing diluted earnings per share (in shares)	109,269	1,082