DISCONTINUED OPERATIONS DISCONTINUED OPERATIONS - Revenue (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Revenue	$ 16,187	$ 16,215
Direct costs	6,791	6,061
Gross profit	9,396	10,154
Discontinued Operations
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Revenue		108,463
Direct costs		69,800
Gross profit		38,663
Permanent Recruitment
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Revenue	9,567	11,689
Direct costs	728	2,018
Gross profit	$ 8,839	9,671
Permanent Recruitment | Discontinued Operations
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Revenue		20,700
Direct costs		190
Gross profit		20,510
Contracting | Discontinued Operations
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Revenue		76,615
Direct costs		67,980
Gross profit		8,635
Talent Management | Discontinued Operations
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Revenue		10,694
Direct costs		1,225
Gross profit		9,469
Other | Discontinued Operations
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Revenue		454
Direct costs		405
Gross profit		$ 49