CONSOLIDATED STATEMENTS OF INCOME (UNAUDITED) - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2022	Mar. 31, 2021
Income Statement [Abstract]
Revenues, net		$ 329,208	$ 261,415
Cost of revenues	[1]	207,516	158,821
Gross profit	[1]	121,692	102,594
Operating expenses:
General and administrative expenses		39,945	30,703
Selling and marketing expenses		24,170	18,235
Depreciation and amortization expense		13,602	12,101
Total operating expenses		77,717	61,039
Income from operations		43,975	41,555
Foreign exchange gain, net		1,756	434
Interest expense		(876)	(2,474)
Other income, net		2,411	1,410
Income before income tax expense and earnings from equity affiliates		47,266	40,925
Income tax expense		11,202	8,958
Income before earnings from equity affiliates		36,064	31,967
Gain/(loss) from equity-method investment		114	(36)
Net income attributable to ExlService Holdings, Inc. stockholders		$ 36,178	$ 31,931
Earnings per share attributable to ExlService Holdings, Inc. stockholders:
Basic (in dollars per share)		$ 1.08	$ 0.95
Diluted (in dollars per share)		$ 1.07	$ 0.93
Weighted-average number of shares used in computing earnings per share attributable to ExlService Holdings Inc. stockholders:
Basic (in shares)		33,442,038	33,734,118
Diluted (in shares)		33,894,868	34,318,318

[1] Exclusive of depreciation and amortization expense.