Condensed Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Mar. 31, 2012	Dec. 31, 2011
Current assets
Cash and cash equivalents	$ 182,438	$ 264,423
Restricted cash	10,267	10,213
Accounts receivable:
Billed receivables	335,041	335,758
Unbilled receivables	195,740	173,440
Allowance for doubtful accounts and unbilled services	(81,806)	(80,096)
Accounts receivable, net	448,975	429,102
Current portion of notes receivable	30,734	26,687
Prepaid expenses and other current assets	38,466	30,448
Income taxes receivable	8,300	10,081
Total current assets	719,180	770,954
Property and equipment, net of accumulated depreciation	71,807	74,448
Goodwill	1,320,002	1,309,358
Other intangible assets, net of amortization	114,666	118,889
Notes receivable, net of current portion	92,787	81,748
Other assets	52,655	55,687
Total assets	2,371,097	2,411,084
Current liabilities
Accounts payable, accrued expenses and other	120,024	132,773
Accrued compensation	110,252	180,366
Current portion of long-term debt and capital lease obligations	154,658	153,381
Billings in excess of services provided	21,622	19,063
Deferred income taxes	1,997	12,254
Total current liabilities	408,553	497,837
Long-term debt and capital lease obligations, net of current portion	643,330	643,579
Deferred income taxes	92,665	88,071
Other liabilities	76,966	75,395
Total liabilities	1,221,514	1,304,882
Commitments and contingent liabilities (notes 7, 9 and 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-41,981 (2012) and 41,484 (2011)	420	415
Additional paid-in capital	396,074	383,978
Retained earnings	796,632	778,201
Accumulated other comprehensive loss	(43,543)	(56,392)
Total stockholders' equity	1,149,583	1,106,202
Total liabilities and stockholders' equity	$ 2,371,097	$ 2,411,084