CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Statement of Comprehensive Income [Abstract]
Net income	$ 36,080	$ 28,577
Changes in available-for-sale securities, net of tax effect of $(43) in 2014 and $47 in 2013	74	(78)
Foreign currency translation	14,779	458
Comprehensive income	50,933	28,957
Less: comprehensive income attributable to non-controlling interests	318	193
Comprehensive income attributable to WEX Inc.	$ 50,615	$ 28,764