SEGMENT INFORMATION (SEGMENT FINANCIALS) (DETAILS) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Dec. 31, 2015
Segment Reporting Information [Line Items]
Gross Revenue	$ 312,610	$ 325,528
Intersegment Sales	(200)	(7)
Net Revenue	312,410	325,521
Depreciation and amortization	17,729	15,363
Income (Loss) from Operations	17,753	26,128
Capital Expenditures	14,949	13,038
Total Assets	865,893		$ 843,327
Goodwill	114,506		114,183
Customer Management Services [Member]
Segment Reporting Information [Line Items]
Gross Revenue	228,019	243,009
Intersegment Sales	(98)	0
Net Revenue	227,921	243,009
Depreciation and amortization	12,254	10,797
Income (Loss) from Operations	15,595	21,702
Capital Expenditures	11,978	9,447
Total Assets	546,610		512,100
Goodwill	22,218		22,009
Customer Growth Services [Member]
Segment Reporting Information [Line Items]
Gross Revenue	33,519	25,956
Intersegment Sales	0	0
Net Revenue	33,519	25,956
Depreciation and amortization	1,743	1,485
Income (Loss) from Operations	495	26
Capital Expenditures	1,187	1,305
Total Assets	72,460		75,291
Goodwill	24,439		24,439
Customer Technology Services [Member]
Segment Reporting Information [Line Items]
Gross Revenue	35,370	35,721
Intersegment Sales	(102)	(7)
Net Revenue	35,268	35,714
Depreciation and amortization	2,875	2,164
Income (Loss) from Operations	2,780	2,009
Capital Expenditures	1,733	2,282
Total Assets	154,770		159,850
Goodwill	42,709		42,709
Customer Strategy Services [Member]
Segment Reporting Information [Line Items]
Gross Revenue	15,702	20,842
Intersegment Sales	0	0
Net Revenue	15,702	20,842
Depreciation and amortization	857	917
Income (Loss) from Operations	(1,117)	2,391
Capital Expenditures	51	$ 4
Total Assets	92,053		96,086
Goodwill	$ 25,140		$ 25,026