FAIR VALUE (CONTINGENT CONSIDERATION TABLE) (DETAILS) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
BusinessAcquisitionContingentConsiderationLineItems
Beginning balance, contingent consideration			$ 16,990
Acquisitions	18,373	2,557
Payments	(9,144)	(1,100)
Imputed Interest/ Adjustments	(6,233)	3,301
Ending balance, contingent consideration			16,990
Iknowtion [Member]
BusinessAcquisitionContingentConsiderationLineItems
Beginning balance, contingent consideration	2,265	3,470	3,633
Payments	(1,400)	(1,100)
Imputed Interest/ Adjustments	195	937
Ending balance, contingent consideration	2,265	3,470	3,633
Guidon [Member]
BusinessAcquisitionContingentConsiderationLineItems
Beginning balance, contingent consideration	1,000	2,637	2,200
Payments	(1,426)
Imputed Interest/ Adjustments	(211)	437
Ending balance, contingent consideration	1,000	2,637	2,200
Technology Solutions Group [Member]
BusinessAcquisitionContingentConsiderationLineItems
Beginning balance, contingent consideration	0	12,933	11,157
Payments	(5,292)
Imputed Interest/ Adjustments	(7,641)	1,776
Ending balance, contingent consideration	0	12,933	11,157
WebMetro [Member]
BusinessAcquisitionContingentConsiderationLineItems
Beginning balance, contingent consideration	0	2,708	0
Acquisitions		2,557
Payments	(1,026)
Imputed Interest/ Adjustments	(1,682)	151
Ending balance, contingent consideration	0	2,708	0
Sofica [Member]
BusinessAcquisitionContingentConsiderationLineItems
Beginning balance, contingent consideration	6,317	0
Acquisitions	3,830
Imputed Interest/ Adjustments	2,487
Ending balance, contingent consideration	6,317	0
rogenSi [Member]
BusinessAcquisitionContingentConsiderationLineItems
Beginning balance, contingent consideration	15,162	0
Acquisitions	14,543
Imputed Interest/ Adjustments	619
Ending balance, contingent consideration	$ 15,162	$ 0