Income Taxes - Additional Information (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended				9 Months Ended
	Sep. 30, 2013	Mar. 31, 2013	Sep. 30, 2012	Jun. 30, 2012	Sep. 30, 2013	Sep. 30, 2012	Dec. 31, 2012
Income Tax [Line Items]
Federal statutory income tax rate					35.00%
Increase in tax benefit due to discrete items					$ 14,477	$ 45,771
Increase in tax benefit due to reversal of uncertain tax positions and accrued interest	1,486	12,869			14,355
Unrecognized tax benefits due to settlement of tax examination			38,024	1,015
Impact on effective tax rate			29,059	660		29,059
Reversal of accrued interest related to unrecognized tax benefits			8,034	966
Reversal of accrued interest, impact on effective tax rate			4,860	584		35,566
Included tax benefits discontinued operation tax provision					6,407	(5,213)
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
Long-term income taxes payable	51,298				51,298		63,465
Minimum unrecorded tax benefit reduction	0				0
Maximum unrecorded tax benefit reduction	14,000				14,000
Careers - China
Income Tax [Line Items]
Included tax benefits discontinued operation tax provision			(9,090)			(9,090)
United States
Income Tax [Line Items]
Unrecognized tax benefits due to settlement of tax examination					12,979
Impact on effective tax rate	12,391				12,391
Reversal of accrued interest related to unrecognized tax benefits					3,245
Reversal of accrued interest, impact on effective tax rate					1,963
State and Local Jurisdiction
Income Tax [Line Items]
Impact on effective tax rate			$ 403			$ 403