Condensed Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
Current assets
Cash and cash equivalents	$ 100,703	$ 156,785
Restricted cash	1,118	1,190
Accounts receivable:
Billed receivables	334,539	314,491
Unbilled receivables	234,961	208,797
Allowance for doubtful accounts and unbilled services	(98,904)	(94,048)
Accounts receivable, net	470,596	429,240
Current portion of notes receivable	32,452	33,194
Prepaid expenses and other current assets	43,157	50,351
Current portion of deferred tax assets	3,703	3,615
Total current assets	651,729	674,375
Property and equipment, net of accumulated depreciation	66,706	68,192
Goodwill	1,252,440	1,260,035
Other intangible assets, net of amortization	101,858	104,181
Notes receivable, net of current portion	100,948	101,623
Other assets	65,771	67,046
Total assets	2,239,452	2,275,452
Current liabilities
Accounts payable, accrued expenses and other	97,877	98,109
Accrued compensation	132,109	168,392
Current portion of long-term debt and capital lease obligations	6,021	6,021
Billings in excess of services provided	33,238	31,675
Total current liabilities	269,245	304,197
Long-term debt and capital lease obligations, net of current portion	717,024	717,024
Deferred income taxes	111,440	105,751
Other liabilities	83,415	80,248
Total liabilities	1,181,124	1,207,220
Commitments and contingent liabilities (notes 8, 10 and 11)
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-40,208 (2013) and 40,755 (2012)	402	408
Additional paid-in capital	349,909	367,978
Retained earnings	764,895	741,215
Accumulated other comprehensive loss	(56,878)	(41,369)
Total stockholders' equity	1,058,328	1,068,232
Total liabilities and stockholders' equity	$ 2,239,452	$ 2,275,452