CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Current assets
Cash and cash equivalents	$ 69,710	$ 75,753
Receivables, net of allowances of $4,799 and $3,873, respectively	262,845	268,162
Recoverable income taxes	7,921	4,614
Prepaid expenses	23,219	25,884
Other current assets	58,126	33,578
Total current assets	421,821	407,991
Noncurrent assets
Property and equipment, net	80,228	78,950
Software, net	155,386	185,496
Goodwill	909,691	909,691
Intangible assets, net	191,281	203,634
Deferred income taxes, net	66,749	77,479
Other noncurrent assets	36,483	39,054
TOTAL ASSETS	1,861,639	1,902,295
Current liabilities
Accounts payable	34,718	42,873
Employee compensation	48,933	47,804
Current portion of long-term debt	17,786	90,323
Deferred revenue	107,543	105,191
Income taxes payable	9,898	11,334
Other current liabilities	102,904	78,841
Total current liabilities	321,782	376,366
Noncurrent liabilities
Deferred revenue	51,967	49,863
Long-term debt	667,943	653,595
Deferred income taxes, net	16,910	26,349
Other noncurrent liabilities	38,440	41,205
Total liabilities	1,097,042	1,147,378
Commitments and contingencies (Note 14)
Stockholders' equity
Preferred stock; $0.01 par value; 5,000,000 shares authorized; no shares issued at December 31, 2017 and 2016
Common stock; $0.005 par value; 280,000,000 shares authorized; 140,525,055 shares issued at December 31, 2017 and 2016	702	702
Additional paid-in capital	610,345	600,344
Retained earnings	550,866	545,731
Treasury stock, at cost, 23,428,324 and 23,188,258 shares at December 31, 2017 and 2016, respectively	(319,960)	(297,760)
Accumulated other comprehensive loss	(77,356)	(94,100)
Total stockholders' equity	764,597	754,917
TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY	$ 1,861,639	$ 1,902,295

Carrying value as of the balance sheet date of liabilities incurred (and for which invoices have typically been received) and 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).

Name:	us-gaap_AccountsPayableCurrent
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount due from customers or clients, within one year of the balance sheet date (or the normal operating cycle, whichever is longer), for goods or services (including trade receivables) that have been delivered or sold in the normal course of business, reduced to the estimated net realizable fair value by an allowance established by the entity of the amount it deems uncertain of collection.