ACQUISITIONS (ASSETS ACQUIRED TABLE) (DETAILS) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Aug. 09, 2013	Jan. 28, 2014	Aug. 08, 2014
Business Acquisition [Line Items]
Goodwill	$ 128,705	$ 102,743	$ 98,241
Accrued employee compensation and benefits	70,069	80,130
Technology Solutions Group [Member]
Business Acquisition [Line Items]
Total Purchase Price			44,500
WebMetro [Member]
Business Acquisition [Line Items]
Total Purchase Price				17,800
Sofica [Member]
Business Acquisition [Line Items]
Cash					857
Accounts receivable, net					3,175
Other assets					378
Property, plant and equipment					653
Customer relationships					4,915
Goodwill					6,358
Total assets acquired					16,336
Accounts payable					296
Accrued expenses					664
Accrued employee compensation and benefits					697
Other					507
Total Liabilities					2,164
Total Purchase Price					14,172
rogenSi [Member]
Business Acquisition [Line Items]
Cash						2,670
Accounts receivable, net						6,417
Other assets						3,328
Property, plant and equipment						578
Customer relationships						9,314
Goodwill						20,860
Total assets acquired						43,167
Accounts payable						708
Accrued expenses						1,146
Accrued employee compensation and benefits						2,203
Other						4,845
Total Liabilities						8,902
Total Purchase Price						$ 34,265