ACQUISITIONS (ASSETS ACQUIRED TABLE) (DETAILS) - USD ($) $ in Thousands	Dec. 31, 2016	Nov. 09, 2016	Dec. 31, 2015	Dec. 31, 2014	Aug. 08, 2014	Feb. 28, 2014
Business Acquisition [Line Items]
Total deferred tax assets, net	$ 71,754		$ 82,988
Goodwill	129,648		114,183	$ 128,705
Accrued employee compensation and benefits	$ 66,133		$ 71,634
Atelka [Member]
Business Acquisition [Line Items]
Cash		$ 2,655
Accounts receivable.		18,104
Other assets		616
Property, plant and equipment.		3,161
Total deferred tax assets, net		583
Customer relationships		10,500
Goodwill		20,876
Total assets acquired		56,495
Accounts payable		1,199
Accrued employee compensation and benefits		2,413
Accrued expenses		2,418
Other		1,678
Total liabilities assumed		7,708
Total purchase price		$ 48,787
rogenSi [Member]
Business Acquisition [Line Items]
Total purchase price					$ 34,400
Sofica [Member]
Business Acquisition [Line Items]
Total purchase price						$ 14,200