Sum of the carrying amounts as of the balance sheet date of all assets that are recognized. Assets are probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.

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Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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The cash outflow associated with the acquisition of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale; includes cash outflows to pay for construction of self-constructed assets.

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Aggregate revenue during the period from services rendered in the normal course of business, after deducting allowances and discounts.

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SEGMENT INFORMATION (SEGMENT FINANCIALS) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017	Dec. 31, 2017
Segment Reporting Information [Line Items]
Net Revenue	$ 349,853	$ 353,429	$ 725,102	$ 691,706
Depreciation and amortization	16,811	16,258	34,735	30,758
Income (Loss) from Operations	13,503	21,589	38,444	48,079
Capital Expenditures	9,375	17,554	16,883	$ 29,589
Total Assets	988,530		988,530		$ 1,078,736
Goodwill	203,518		203,518		206,694
Operating Segments
Segment Reporting Information [Line Items]
Net Revenue	349,972
Intersegment Eliminations
Segment Reporting Information [Line Items]
Net Revenue	(119)
Customer Management Services [Member]
Segment Reporting Information [Line Items]
Net Revenue	262,213
Depreciation and amortization	14,073
Income (Loss) from Operations	3,773
Capital Expenditures	8,188	15,390
Total Assets	762,074		762,074		869,594
Goodwill	115,523		115,523		119,497
Customer Management Services [Member] \| Operating Segments
Segment Reporting Information [Line Items]
Net Revenue	262,213
Customer Management Services [Member] \| Intersegment Eliminations
Segment Reporting Information [Line Items]
Net Revenue	0
Customer Growth Services [Member]
Segment Reporting Information [Line Items]
Net Revenue	35,140
Depreciation and amortization	656
Income (Loss) from Operations	2,966
Capital Expenditures		242
Total Assets	44,194		44,194		41,036
Goodwill	24,439		24,439		24,439
Customer Growth Services [Member] \| Operating Segments
Segment Reporting Information [Line Items]
Net Revenue	35,140
Customer Growth Services [Member] \| Intersegment Eliminations
Segment Reporting Information [Line Items]
Net Revenue	0
Customer Technology Services [Member]
Segment Reporting Information [Line Items]
Net Revenue	33,816
Depreciation and amortization	1,580
Income (Loss) from Operations	5,566
Capital Expenditures	1,025	1,645
Total Assets	106,573		106,573		100,351
Goodwill	42,012		42,012		40,839
Customer Technology Services [Member] \| Operating Segments
Segment Reporting Information [Line Items]
Net Revenue	33,935
Customer Technology Services [Member] \| Intersegment Eliminations
Segment Reporting Information [Line Items]
Net Revenue	(119)
Customer Strategy Services [Member]
Segment Reporting Information [Line Items]
Net Revenue	18,684
Depreciation and amortization	502
Income (Loss) from Operations	1,198
Capital Expenditures	162	$ 277
Total Assets	75,689		75,689		67,755
Goodwill	21,544		$ 21,544		$ 21,919
Customer Strategy Services [Member] \| Operating Segments
Segment Reporting Information [Line Items]
Net Revenue	18,684
Customer Strategy Services [Member] \| Intersegment Eliminations
Segment Reporting Information [Line Items]
Net Revenue	$ 0