SEGMENT INFORMATION (SEGMENT FINANCIALS) (DETAILS) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Dec. 31, 2013
Segment Reporting Information [Line Items]
Gross Revenue	$ 302,224	$ 289,321
Intersegment Sales	(3)	(938)
Net Revenue	302,221	288,383
Depreciation and amortization	13,170	10,555
Income (Loss) from Operations	24,357	22,998
Capital Expenditures	15,095	4,105
Total Assets	831,940		842,342
Goodwill	110,553		102,743
Customer Management Services [Member]
Segment Reporting Information [Line Items]
Gross Revenue	227,924	222,889
Intersegment Sales		(307)
Net Revenue	227,924	222,582
Depreciation and amortization	9,465	7,862
Income (Loss) from Operations	20,823	20,731
Capital Expenditures	9,912	2,286
Total Assets	546,007		554,015
Goodwill	27,279		19,819
Customer Growth Services [Member]
Segment Reporting Information [Line Items]
Gross Revenue	28,905	22,856
Net Revenue	28,905	22,856
Depreciation and amortization	1,556	697
Income (Loss) from Operations	1,770	1,276
Capital Expenditures	380	316
Total Assets	87,897		86,416
Goodwill	30,128		30,128
Customer Technology Services [Member]
Segment Reporting Information [Line Items]
Gross Revenue	32,779	33,646
Intersegment Sales	(3)	(84)
Net Revenue	32,776	33,562
Depreciation and amortization	1,715	1,516
Income (Loss) from Operations	311	2,898
Capital Expenditures	4,631	1,328
Total Assets	152,103		157,040
Goodwill	42,709		42,709
Customer Strategy Services [Member]
Segment Reporting Information [Line Items]
Gross Revenue	12,616	9,930
Intersegment Sales		(547)
Net Revenue	12,616	9,383
Depreciation and amortization	434	480
Income (Loss) from Operations	1,453	(1,907)
Capital Expenditures	172	175
Total Assets	45,933		44,871
Goodwill	$ 10,437		$ 10,087