Income Taxes - Additional Information (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended				9 Months Ended
	Sep. 30, 2012	Jun. 30, 2012	Sep. 30, 2011	Jun. 30, 2011	Sep. 30, 2012	Sep. 30, 2011	Dec. 31, 2011
Significant Change in Unrecognized Tax Benefits is Reasonably Possible [Line Items]
Federal statutory income tax rate					35.00%
Increase in tax benefit due to discrete items					$ 45,771
Increase in tax benefit due to Company's restructuring					19,276
Total benefit reflected in income tax provision due to reversals of tax and interest	34,322	1,244			35,566	1,488
Unrecognized tax benefits due to settlement of tax examination	38,024	1,015		1,456
Impact on effective tax rate	29,059	660		947	29,059
Reversal of accrued interest related to unrecognized tax benefits	8,034	966		832
Reversal of accrued interest, impact on effective tax rate	4,860	584		541
Reversal of accrued interest related to state tax matter	403
Income tax provision	(26,162)		8,813		(39,122)	16,132
Long-term income taxes payable	61,612				61,612		94,750
Minimum unrecorded tax benefits	0				0
Maximum unrecorded tax benefits	15,000				15,000
Careers - China
Significant Change in Unrecognized Tax Benefits is Reasonably Possible [Line Items]
Income tax provision	9,090
Release of ChinaHR escrowed funds			$ 17,400