CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Assets
Cash and cash equivalents	$ 533,361	$ 508,072
Restricted cash	22,696	18,866
Accounts receivable (net of allowances of $38,103 in 2018 and $30,207 in 2017)	3,124,204	2,517,980
Securitized accounts receivable, restricted	142,575	150,235
Prepaid expenses and other current assets	85,842	69,413
Total current assets	3,908,678	3,264,566
Property, equipment and capitalized software (net of accumulated depreciation of $312,921 in 2018 and $264,928 in 2017)	166,999	163,908
Goodwill	1,838,909	1,876,132
Other intangible assets (net of accumulated amortization of $480,950 in 2018 and $392,827 in 2017)	1,069,116	1,154,047
Investment securities	24,088	23,358
Deferred income taxes, net	8,610	7,752
Other assets	143,342	253,088
Total assets	7,159,742	6,742,851
Liabilities and Stockholders’ Equity
Accounts payable	1,160,661	811,362
Accrued expenses	308,021	315,346
Short-term deposits	878,071	986,989
Short-term debt, net	238,864	397,218
Other current liabilities	26,848	24,795
Total current liabilities	2,612,465	2,535,710
Long-term debt, net	2,140,875	2,027,752
Long-term deposits	386,770	306,865
Deferred income taxes, net	140,478	119,283
Other liabilities	29,897	32,683
Total liabilities	5,310,485	5,022,293
Stockholders’ Equity
Common Stock $0.01 par value; 175,000 shares authorized; 47,528 shares issued in 2018 and 47,352 in 2017; 43,100 shares outstanding in 2018 and 43,022 in 2017	475	473
Additional paid-in capital	584,047	569,319
Retained earnings	1,550,577	1,404,683
Accumulated other comprehensive loss	(123,260)	(90,795)
Treasury stock at cost; 4,428 shares in 2018 and 2017	(172,342)	(172,342)
Total WEX Inc. stockholders’ equity	1,839,497	1,711,338
Non-controlling interest	9,760	9,220
Total stockholders’ equity	1,849,257	1,720,558
Total liabilities and stockholders’ equity	$ 7,159,742	$ 6,742,851