XML 76 R64.htm IDEA: XBRL DOCUMENT v3.10.0.1

Stock-Based Compensation - Additional Information (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Fair value of units awarded	$ 4.7	$ 0.4	$ 34.8	$ 45.7

X

- References

No definition available.

+ Details

Name:	us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Share-based Compensation Arrangement by Share-based Payment Award, Grants in Period, Fair Value

+ References

No definition available.

+ Details

Name:	wex_ShareBasedCompensationArrangementByShareBasedPaymentAwardGrantsInPeriodFairValue
Namespace Prefix:	wex_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration