CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Current assets:
Cash and cash equivalents	$ 173,446	$ 207,232
Short-term investments	123,082
Accounts receivable, net	835,958	834,764
Prepaid expenses and other current assets	26,641	14,527
TOTAL CURRENT ASSETS	1,159,127	1,056,523
Property and equipment, net	47,734	33,046
Operating lease assets	177,276
Deferred income taxes	8,460	8,460
Other assets, non-current	22,442	19,843
TOTAL ASSETS	1,415,039	1,117,872
Current liabilities:
Accounts payable	647,547	669,147
Accrued expenses and other current liabilities	40,553	44,844
Operating lease liabilities	15,938
TOTAL CURRENT LIABILITIES	704,038	713,991
Operating lease liabilities, non-current	167,668
Other liabilities, non-current	7,941	9,314
TOTAL LIABILITIES	879,647	723,305
Commitments and contingencies (Note 9)
STOCKHOLDERS’ EQUITY
Preferred stock, par value $0.000001; 100,000 shares authorized, zero shares issued and outstanding as of September 30, 2019 and December 31, 2018
Common stock, par value $0.000001 Class A, 1,000,000 shares authorized; 39,810 and 36,822 shares issued and outstanding as of September 30, 2019 and December 31, 2018, respectively Class B, 95,000 shares authorized; 5,311 and 7,042 shares issued and outstanding as of September 30, 2019 and December 31, 2018, respectively	0	0
Additional paid-in capital	353,899	270,447
Retained earnings	181,493	124,120
TOTAL STOCKHOLDERS’ EQUITY	535,392	394,567
TOTAL LIABILITIES AND STOCKHOLDERS’ EQUITY	$ 1,415,039	$ 1,117,872