REVENUE, DIRECT COSTS AND GROSS MARGIN Revenue, Direct Costs and Gross Margin (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended				9 Months Ended
	Sep. 30, 2014		Sep. 30, 2013		Sep. 30, 2014		Sep. 30, 2013
Revenue Direct Costs And Gross Margin Line Items [Line Items]
Revenue	$ 149,278	[1]	$ 139,287	[1]	$ 444,515	[1]	$ 422,573	[1]
Direct costs	93,591	[2]	88,796	[2]	274,927	[2]	265,982	[2]
Gross margin	55,687		50,491		169,588		156,591
Temporary Contracting
Revenue Direct Costs And Gross Margin Line Items [Line Items]
Revenue	106,981		102,428		312,591		306,646
Direct costs	90,594	[2]	86,300	[2]	264,982	[2]	257,717	[2]
Gross margin	16,387		16,128		47,609		48,929
Permanent Recruitment
Revenue Direct Costs And Gross Margin Line Items [Line Items]
Revenue	31,713		28,535		96,134		85,575
Direct costs	736	[2]	713	[2]	1,893	[2]	1,748	[2]
Gross margin	30,977		27,822		94,241		83,827
Other Than Temporary Contracting and Permanent Recruitment
Revenue Direct Costs And Gross Margin Line Items [Line Items]
Revenue	10,584		8,324		35,790		30,352
Direct costs	2,261	[2]	1,783	[2]	8,052	[2]	6,517	[2]
Gross margin	$ 8,323		$ 6,541		$ 27,738		$ 23,835

[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 in Temporary Contracting include the direct staffing costs of salaries, payroll taxes, employee benefits, travel expenses, rent 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 category. 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 under the caption "Selling, general and administrative expenses" in the Condensed Consolidated Statements of Operations and Other Comprehensive Income (Loss).