REVENUE, DIRECT COSTS AND GROSS MARGIN (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Revenue Direct Costs And Gross Margin Line Items [Line Items]
Revenue	$ 100,314	$ 108,136	$ 113,067	$ 101,227	$ 106,109	$ 110,028	$ 122,743	$ 124,317	$ 422,744	$ 463,197	$ 581,192
Direct costs									248,327	275,487	358,347
Gross margin	$ 42,774	$ 43,542	$ 46,839	$ 41,262	$ 44,439	$ 45,145	$ 50,222	$ 47,904	174,417	187,710	222,845
Temporary Contracting
Revenue Direct Costs And Gross Margin Line Items [Line Items]
Revenue									270,777	305,052	408,106
Direct costs									236,654	262,322	345,586
Gross margin									34,123	42,730	62,520
Permanent Recruitment
Revenue Direct Costs And Gross Margin Line Items [Line Items]
Revenue									112,582	118,934	126,686
Direct costs									2,429	2,733	2,369
Gross margin									110,153	116,201	124,317
Talent Management [Member]
Revenue Direct Costs And Gross Margin Line Items [Line Items]
Revenue									37,204	37,425	43,586
Direct costs									7,216	8,681	7,980
Gross margin									29,988	28,744	35,606
Other Than Temporary Contracting, Permanent Recruitment and Talent Management [Member] [Member]
Revenue Direct Costs And Gross Margin Line Items [Line Items]
Revenue									2,181	1,786	2,814
Direct costs									2,028	1,751	2,412
Gross margin									$ 153	$ 35	$ 402