REVENUE, DIRECT COSTS AND GROSS MARGIN Revenue, Direct Costs and Gross Margin (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2011	Sep. 30, 2011	Jun. 30, 2011	Mar. 31, 2011	Dec. 31, 2012		Dec. 31, 2011		Dec. 31, 2010
Revenue Direct Costs And Gross Margin Line Items [Line Items]
Revenue	$ 184,276	$ 187,873	$ 204,838	$ 200,590	$ 222,738	$ 245,081	$ 247,378	$ 218,539	$ 777,577	[1]	$ 933,736	[1]	$ 794,542	[1]
Direct costs									492,710	[2]	579,431	[2]	495,969	[2]
Gross margin	66,925	67,666	77,068	73,208	84,648	92,992	95,467	81,198	284,867		354,305		298,573
Temporary Contracting
Revenue Direct Costs And Gross Margin Line Items [Line Items]
Revenue									579,914		692,665		585,321
Direct costs									478,126	[2]	564,462	[2]	482,175	[2]
Gross margin									101,788		128,203		103,146
Other
Revenue Direct Costs And Gross Margin Line Items [Line Items]
Revenue									197,663		241,071		209,221
Direct costs									14,584	[2]	14,969	[2]	13,794	[2]
Gross margin									$ 183,079		$ 226,102		$ 195,427

[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.