SEGMENT INFORMATION (SEGMENT FINANCIALS) (DETAILS) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012	Dec. 31, 2012
Segment Reporting Information [Line Items]
Gross Revenue	$ 290,337	$ 289,309	$ 579,658	$ 583,511
Intersegment Sales	(645)	(511)	(1,583)	(2,059)
Net Revenue	289,692	288,798	578,075	581,452
Depreciation and amortization	11,263	10,229	21,818	20,345
Income (Loss) from Operations	19,675	6,446	42,673	25,196
Capital Expenditures	9,555	10,994	13,660	17,478
Total Assets	810,638		810,638		847,173
Goodwill	93,577		93,577		94,679
Customer Management Services [Member]
Segment Reporting Information [Line Items]
Gross Revenue	220,965	229,401	443,854	464,277
Intersegment Sales	(324)	0	(631)	0
Net Revenue	220,641	229,401	443,223	464,277
Depreciation and amortization	8,532	8,302	16,394	16,462
Income (Loss) from Operations	16,460	730	37,191	17,437
Capital Expenditures	8,110	9,733	10,396	15,446
Total Assets	561,321		561,321		588,627
Goodwill	19,982		19,982		20,288
Customer Growth Services [Member]
Segment Reporting Information [Line Items]
Gross Revenue	22,399	24,409	45,255	47,173
Intersegment Sales	0	0	0	0
Net Revenue	22,399	24,409	45,255	47,173
Depreciation and amortization	777	898	1,474	1,698
Income (Loss) from Operations	(614)	1,052	662	(1,078)
Capital Expenditures	435	661	751	1,034
Total Assets	48,046		48,046		54,164
Goodwill	24,439		24,439		24,439
Customer Technology Services [Member]
Segment Reporting Information [Line Items]
Gross Revenue	36,717	25,152	70,363	51,351
Intersegment Sales	(73)	(196)	(157)	(843)
Net Revenue	36,644	24,956	70,206	50,508
Depreciation and amortization	1,489	687	3,005	1,492
Income (Loss) from Operations	5,819	4,356	8,717	8,035
Capital Expenditures	960	523	2,288	854
Total Assets	152,095		152,095		148,043
Goodwill	39,069		39,069		38,591
Customer Strategy Services [Member]
Segment Reporting Information [Line Items]
Gross Revenue	10,256	10,347	20,186	20,710
Intersegment Sales	(248)	(315)	(795)	(1,216)
Net Revenue	10,008	10,032	19,391	19,494
Depreciation and amortization	465	342	945	693
Income (Loss) from Operations	(1,990)	308	(3,897)	802
Capital Expenditures	50	77	225	144
Total Assets	49,176		49,176		56,339
Goodwill	$ 10,087		$ 10,087		$ 11,361