Condensed Consolidated Balance Sheets - Entity [Domain] - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Current assets
Cash and cash equivalents	$ 239,988	$ 283,680
Accounts receivable:
Billed receivables	419,906	381,464
Unbilled receivables	298,964	248,462
Allowance for doubtful accounts and unbilled services	(169,570)	(144,825)
Accounts receivable, net	549,300	485,101
Current portion of notes receivable	36,281	27,208
Prepaid expenses and other current assets	53,727	60,852
Current portion of deferred tax assets	25,127	27,332
Total current assets	904,423	884,173
Property and equipment, net of accumulated depreciation	80,527	82,163
Goodwill	1,208,508	1,211,689
Other intangible assets, net of amortization	70,356	77,034
Notes receivable, net of current portion	120,076	122,149
Other assets	53,174	53,319
Total assets	2,437,064	2,430,527
Current liabilities
Accounts payable, accrued expenses and other	90,083	99,494
Accrued compensation	183,416	220,959
Current portion of long-term debt	11,000	11,000
Billings in excess of services provided	30,122	35,639
Total current liabilities	314,621	367,092
Long-term debt, net of current portion	700,000	700,000
Deferred income taxes	161,534	161,932
Other liabilities	97,327	98,757
Total liabilities	$ 1,273,482	$ 1,327,781
Commitments and contingent liabilities (note 10)
Stockholders' equity
Preferred stock, $0.01 par value; shares authorized-5,000; none outstanding
Common stock, $0.01 par value; shares authorized-75,000; shares issued and outstanding-41,807 (2015) and 41,181 (2014)	$ 418	$ 412
Additional paid-in capital	415,793	393,174
Retained earnings	834,823	789,428
Accumulated other comprehensive loss	(87,452)	(80,268)
Total stockholders' equity	1,163,582	1,102,746
Total liabilities and stockholders' equity	$ 2,437,064	$ 2,430,527

Sum of the carrying values as of the balance sheet date of obligations incurred through that date and due within one year (or the operating cycle, if longer), including liabilities incurred (and for which invoices have typically been received) and payable to vendors for goods and services received, taxes, interest, rent and utilities, accrued salaries and bonuses, payroll taxes and fringe benefits.

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Balance Type:	credit
Period Type:	instant

- Definition

Amounts 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.