SUMMARY OF ACCOUNTING POLICIES - Goodwill (Details)	3 Months Ended	12 Months Ended
	Mar. 31, 2017 USD ($) segment	Mar. 31, 2017 USD ($) segment business	Mar. 31, 2016 USD ($)
Goodwill [Line Items]
Number of reportable units | segment		4
Number of operating segments | segment	4	4
Impairment charges		$ 0	$ 0
Activity in goodwill account
Balance, beginning of the period		942,066,000
Balance, end of the period	$ 984,867,000	$ 984,867,000	942,066,000
Number of non-core businesses sold | business		2
Operating segments
Activity in goodwill account
Balance, beginning of the period		$ 942,066,000	333,631,000
Additions		63,842,000	602,847,000
Divestitures		(4,427,000)
Purchase accounting adjustments		794,000	125,000
Foreign currency translation adjustments		(17,408,000)	5,463,000
Balance, end of the period	984,867,000	984,867,000	942,066,000
Operating segments | High Reliability Solutions
Activity in goodwill account
Balance, beginning of the period		439,336,000	93,138,000
Additions		0	340,610,000
Divestitures		(1,787,000)
Purchase accounting adjustments		794,000	125,000
Foreign currency translation adjustments		(17,408,000)	5,463,000
Balance, end of the period	420,935,000	420,935,000	439,336,000
Operating segments | Consumer Technologies Group
Activity in goodwill account
Balance, beginning of the period		68,234,000	68,234,000
Additions		42,989,000	0
Divestitures		0
Purchase accounting adjustments		0	0
Foreign currency translation adjustments		0	0
Balance, end of the period	111,223,000	111,223,000	68,234,000
Operating segments | Industrial & Emerging Industries
Activity in goodwill account
Balance, beginning of the period		322,803,000	64,221,000
Additions		17,544,000	258,582,000
Divestitures		(2,640,000)
Purchase accounting adjustments		0	0
Foreign currency translation adjustments		0	0
Balance, end of the period	337,707,000	337,707,000	322,803,000
Operating segments | Communications Enterprise Compute (CEC)
Activity in goodwill account
Balance, beginning of the period		111,693,000	108,038,000
Additions		3,309,000	3,655,000
Divestitures		0
Purchase accounting adjustments		0	0
Foreign currency translation adjustments		0	0
Balance, end of the period	$ 115,002,000	115,002,000	$ 111,693,000
Operating segments | IEI and HRS Segments
Activity in goodwill account
Divestitures		$ (4,400,000)