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, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2013		Dec. 31, 2012		Dec. 31, 2011
Revenue Direct Costs And Gross Margin Line Items [Line Items]
Revenue	$ 159,503	$ 163,587	$ 171,360	$ 165,678	$ 184,276	$ 187,873	$ 204,838	$ 200,590	$ 660,128	[1]	$ 777,577	[1]	$ 933,736	[1]
Direct costs									430,256	[2]	492,710	[2]	579,431	[2]
Gross margin	56,895	55,796	60,504	56,677	66,925	67,666	77,068	73,208	229,872		284,867		354,305
Temporary Contracting
Revenue Direct Costs And Gross Margin Line Items [Line Items]
Revenue									502,433		579,914		692,665
Direct costs									418,831	[2]	478,126	[2]	564,462	[2]
Gross margin									83,602		101,788		128,203
Permanent Recruitment
Revenue Direct Costs And Gross Margin Line Items [Line Items]
Revenue									114,743		145,790		189,304
Direct costs									2,229	[2]	2,879	[2]	3,740	[2]
Gross margin									112,514		142,911		185,564
Other
Revenue Direct Costs And Gross Margin Line Items [Line Items]
Revenue									42,952		51,873		51,767
Direct costs									9,196	[2]	11,705	[2]	11,229	[2]
Gross margin									$ 33,756		$ 40,168		$ 40,538

[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 Permanent Recruitment and Other categories. 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.