Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
Current assets:
Cash and cash equivalents	$ 28,288	$ 35,750
Total restricted cash	434,567	609,219
Accounts receivable, net of allowance of $9,911 and $10,292 at June 30, 2021 and December 31, 2020, respectively	119,270	95,404
Customer funds receivable	5,390	321
Prepaid expenses and other current assets	103,493	78,366
Total current assets	691,008	819,060
Property and equipment, net	104,914	105,177
Operating lease right-of-use assets	22,630	22,671
Software development costs, net	116,562	111,827
Goodwill	637,510	635,854
Intangible assets, net	260,072	277,506
Other assets	70,666	72,639
Total assets	1,903,362	2,044,734
Current liabilities:
Trade accounts payable	30,605	27,836
Accrued expenses and other current liabilities	55,808	52,228
Due to customers	438,633	608,264
Debt, current portion	12,911	12,840
Deferred revenue, current portion	339,670	312,236
Total current liabilities	877,627	1,013,404
Debt, net of current portion	531,973	518,193
Deferred tax liability	56,227	54,086
Deferred revenue, net of current portion	5,749	4,678
Operating lease liabilities, net of current portion	17,173	17,357
Other liabilities	9,339	10,866
Total liabilities	1,498,088	1,618,584
Commitments and contingencies (see Note 9)
Stockholders' equity:
Preferred stock, shares authorized	20,000,000	20,000,000
Preferred stock, shares outstanding	0	0
Preferred stock; 20,000,000 shares authorized, none outstanding	$ 0	$ 0
Common stock, par value	$ 0.001	$ 0.001
Common stock, shares authorized	180,000,000	180,000,000
Common stock, shares issued	62,332,714	60,904,638
Common stock, $0.001 par value; 180,000,000 shares authorized, 62,332,714 and 60,904,638 shares issued at June 30, 2021 and December 31, 2020, respectively	$ 62	$ 61
Additional paid-in capital	$ 605,486	$ 544,963
Treasury stock, shares	13,451,524	12,054,268
Treasury stock, at cost; 13,451,524 and 12,054,268 shares at June 30, 2021 and December 31, 2020, respectively	$ (449,877)	$ (353,091)
Accumulated other comprehensive income (loss)	6,291	(2,497)
Retained earnings	243,312	236,714
Total stockholders' equity	405,274	426,150
Total liabilities and stockholders' equity	$ 1,903,362	$ 2,044,734

Carrying value as of the balance sheet date of obligations incurred, for which invoices have typically not been received that are payable to vendors for goods and services received that are used in an entity's business. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer). Includes aggregate carrying amount, as of the balance sheet date, of current obligations not separately disclosed in the balance sheet due to materiality considerations. Current liabilities are expected to be paid within one year (or the normal operating cycle, if longer).

No definition available.