REVENUE, DIRECT COSTS AND GROSS MARGIN Revenue, Direct Costs and Gross Margin (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended				6 Months Ended
	Jun. 30, 2012		Jun. 30, 2011		Jun. 30, 2012		Jun. 30, 2011
Revenue Direct Costs And Gross Margin Line Items [Line Items]
Revenue	$ 204,838	[1]	$ 247,378	[1]	$ 405,428	[1]	$ 465,917	[1]
Direct costs	127,770	[2]	151,911	[2]	255,152	[2]	289,252	[2]
Gross margin	77,068		95,467		150,276		176,665
Temporary Contracting
Revenue Direct Costs And Gross Margin Line Items [Line Items]
Revenue	149,629		180,806		300,066		343,867
Direct costs	123,186	[2]	147,669	[2]	247,256	[2]	281,825	[2]
Gross margin	26,443		33,137		52,810		62,042
Other
Revenue Direct Costs And Gross Margin Line Items [Line Items]
Revenue	55,209		66,572		105,362		122,050
Direct costs	4,584	[2]	4,242	[2]	7,896	[2]	7,427	[2]
Gross margin	$ 50,625		$ 62,330		$ 97,466		$ 114,623

[1] Revenue by geographic region disclosed above is net of any inter-segment revenue and, therefore, represents only revenue from external customers according to the location of the operating subsidiary.

[2] Direct costs include the direct staffing costs of salaries, payroll taxes, employee benefits, travel expenses and insurance costs for the Company’s contractors and reimbursed out-of-pocket expenses and other direct costs. Other than reimbursed out-of-pocket expenses, there are no other direct costs associated with the Other category, which includes the search, permanent recruitment and other human resource solutions’ revenue. Gross margin represents revenue less direct costs. The region where services are provided, the mix of contracting and permanent recruitment, and the functional nature of the staffing services provided can affect gross margin. The salaries, commissions, payroll taxes and employee benefits related to recruitment professionals are included in selling, general and administrative expenses.