CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands		Mar. 31, 2020	Dec. 31, 2019
Assets
Cash and cash equivalents	[1]	$ 861,188	$ 810,932
Restricted cash	[1]	165,205	170,449
Accounts receivable (net of allowances of $75,426 in 2020 and $52,274 in 2019)		2,093,924	2,661,108
Securitized accounts receivable, restricted		97,395	112,192
Prepaid expenses and other current assets		93,980	87,694
Total current assets		3,311,692	3,842,375
Property, equipment and capitalized software (net of accumulated depreciation of $363,097 in 2020 and $344,212 in 2019)		207,928	212,475
Goodwill		2,418,288	2,441,201
Other intangible assets (net of accumulated amortization of $698,470 in 2020 and $666,793 in 2019)		1,528,606	1,575,050
Investment securities		30,902	30,460
Deferred income taxes, net		16,335	12,833
Other assets		184,404	184,024
Total assets		7,698,155	8,298,418
Liabilities and Stockholders’ Equity
Accounts payable		745,884	969,816
Accrued expenses		242,651	315,642
Restricted cash payable		165,205	170,449
Short-term deposits		1,137,123	1,310,813
Short-term debt, net		147,219	248,531
Other current liabilities		47,637	34,692
Total current liabilities		2,485,719	3,049,943
Long-term debt, net		2,672,335	2,686,513
Long-term deposits		173,399	143,399
Deferred income taxes, net		212,450	218,740
Other liabilities		117,633	106,422
Total liabilities		5,661,536	6,205,017
Commitments and contingencies (Note 15)
Redeemable non-controlling interest		159,645	156,879
Stockholders’ Equity
Common stock $0.01 par value; 175,000 shares authorized; 47,938 issued in 2020 and 47,749 in 2019; 43,510 shares outstanding in 2020 and 43,321 in 2019		479	477
Additional paid-in capital		680,726	675,060
Retained earnings		1,514,358	1,539,201
Accumulated other comprehensive loss		(156,384)	(115,449)
Treasury stock at cost; 4,428 shares in 2020 and 2019		(172,342)	(172,342)
Total WEX Inc. stockholders’ equity		1,866,837	1,926,947
Non-controlling interest		10,137	9,575
Total stockholders’ equity		1,876,974	1,936,522
Total liabilities and stockholders’ equity		$ 7,698,155	$ 8,298,418

[1] The following table provides a reconciliation of cash, cash equivalents and restricted cash reported within our condensed consolidated balance sheets to amounts within our condensed consolidated statements of cash flows.
  Three Months Ended March 31,   2020   2019 Cash and cash equivalents at beginning of period $ 810,932
  $ 541,498
Restricted cash at beginning of period 170,449
  13,533
Cash, cash equivalents and restricted cash at beginning of period $ 981,381
  $ 555,031
        Cash and cash equivalents at end of period $ 861,188
  $ 387,274
Restricted cash at end of period 165,205
  138,804
Cash, cash equivalents and restricted cash at end of period $ 1,026,393
  $ 526,078