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CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ 51,868	$ (57,717)	$ 85,279	$ (56,593)
Foreign currency translation	(20,368)	15,147	(29,927)	(2,913)
Comprehensive income (loss)	31,500	(42,570)	55,352	(59,506)
Less: Comprehensive income attributable to non-controlling interests	134	1,676	781	3,466
Comprehensive income (loss) attributable to WEX Inc.	$ 31,366	$ (44,246)	$ 54,571	$ (62,972)

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