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, 2013		Sep. 30, 2012		Sep. 30, 2013		Sep. 30, 2012
Revenue Direct Costs And Gross Margin Line Items [Line Items]
Revenue	$ 163,587	[1]	$ 187,873	[1]	$ 500,624	[1]	$ 593,301	[1]
Direct costs	107,791	[2]	120,207	[2]	327,648	[2]	375,359	[2]
Gross margin	55,796		67,666		172,976		217,942
Temporary Contracting
Revenue Direct Costs And Gross Margin Line Items [Line Items]
Revenue	126,321		142,418		383,157		442,484
Direct costs	105,262	[2]	117,419	[2]	319,245	[2]	364,675	[2]
Gross margin	21,059		24,999		63,912		77,809
Other
Revenue Direct Costs And Gross Margin Line Items [Line Items]
Revenue	37,266		45,455		117,467		150,817
Direct costs	2,529	[2]	2,788	[2]	8,403	[2]	10,684	[2]
Gross margin	$ 34,737		$ 42,667		$ 109,064		$ 140,133

[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, 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 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.