ACQUISITIONS AND DIVESTITURES AHFS (TABLES) (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Assets and Liabilities Held for Sale [Line Items]
Total assets held for sale	$ 7,822	$ 7,835
Total liabilities held for sale	3,546	$ 1,322
Business Unit From Customer Growth Services And Customer Strategy Services Segments | Disposal Group, Held-for-sale, Not Discontinued Operations
Assets and Liabilities Held for Sale [Line Items]
Accounts receivable, net - assets held for sale	8,242
Allowance for doubtful accounts of assets held for sale	(358)
Other assets held for sale	922
Property, Plant and Equipment - assets held for sale	58
Goodwill - assets held for sale	3,033
Allowance for reduction of assets held for sale	(4,700)
Total assets held for sale	7,822
Accounts payable held for sale	2,580
Accrued employee compensation and benefits	964
Other liabilities held for sale	2
Total liabilities held for sale	3,546
Business Unit From Customer Growth Services And Customer Strategy Services Segments | Disposal Group, Held-for-sale, Not Discontinued Operations | Customer Relationships [Member]
Assets and Liabilities Held for Sale [Line Items]
Intangible assets held for sale	$ 625