SEGMENT INFORMATION (SEGMENT FINANCIALS) (DETAILS) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011	Dec. 31, 2011
Segment Reporting Information [Line Items]
Gross Revenue	$ 289,373	$ 304,760	$ 872,884	$ 879,375
Intersegment Sales	(3,105)	(525)	(5,164)	(525)
Net Revenue	286,268	304,235	867,720	878,850
Depreciation and amortization	10,695	11,807	31,040	34,828
Income (Loss) from Operations	27,361	26,572	52,557	72,691
Capital Expenditures	15,781	8,804	33,259	21,166
Total Assets	805,604		805,604		746,978
Goodwill	72,154		72,154		70,844
Customer Management Services
Segment Reporting Information [Line Items]
Gross Revenue	224,041	248,690	688,317	742,969
Intersegment Sales	0	0	0	0
Net Revenue	224,041	248,690	688,317	742,969
Depreciation and amortization	5,667	7,043	17,697	22,779
Income (Loss) from Operations	47,181	43,385	120,797	141,223
Capital Expenditures	4,483	4,236	17,465	11,315
Total Assets	497,746		497,746		479,818
Goodwill	20,325		20,325		20,594
Customer Growth Services
Segment Reporting Information [Line Items]
Gross Revenue	28,200	25,793	75,373	71,419
Intersegment Sales	0	0	0	0
Net Revenue	28,200	25,793	75,373	71,419
Depreciation and amortization	862	695	2,059	2,247
Income (Loss) from Operations	5,818	5,020	11,108	12,596
Capital Expenditures	1,940	978	2,833	1,178
Total Assets	49,700		49,700		50,950
Goodwill	24,439		24,439		24,439
Customer Technology Services
Segment Reporting Information [Line Items]
Gross Revenue	25,219	23,401	76,571	39,718
Intersegment Sales	(2,876)	(525)	(3,719)	(525)
Net Revenue	22,343	22,876	72,852	39,193
Depreciation and amortization	774	1,130	2,239	1,647
Income (Loss) from Operations	3,272	4,289	11,734	10,158
Capital Expenditures	842	1,027	1,543	1,142
Total Assets	89,212		89,212		70,745
Goodwill	19,648		19,648		18,516
Customer Strategy Services
Segment Reporting Information [Line Items]
Gross Revenue	11,913	6,876	32,623	25,269
Intersegment Sales	(229)	0	(1,445)	0
Net Revenue	11,684	6,876	31,178	25,269
Depreciation and amortization	351	176	1,040	783
Income (Loss) from Operations	824	(322)	1,671	1,450
Capital Expenditures	113	88	197	226
Total Assets	49,840		49,840		42,882
Goodwill	7,742		7,742		7,295
Reportable Segments
Segment Reporting Information [Line Items]
Gross Revenue	289,373	304,760	872,884	879,375
Intersegment Sales	(3,105)	(525)	(5,164)	(525)
Net Revenue	286,268	304,235	867,720	878,850
Depreciation and amortization	7,654	9,044	23,035	27,456
Income (Loss) from Operations	57,095	52,372	145,310	165,427
Corporate
Segment Reporting Information [Line Items]
Gross Revenue	0	0	0	0
Intersegment Sales	0	0	0	0
Net Revenue	0	0	0	0
Depreciation and amortization	3,041	2,763	8,005	7,372
Income (Loss) from Operations	(29,734)	(25,800)	(92,753)	(92,736)
Capital Expenditures	8,403	2,475	11,221	7,305
Total Assets	$ 119,106		$ 119,106		$ 102,583