BUSINESS COMBINATION: INTANGIBLE ASSETS (Details) $ in Thousands		3 Months Ended
	Feb. 23, 2016 USD ($)	Mar. 31, 2017	Sep. 30, 2016 USD ($)
Business Acquisition [Line Items]
Intangible assets	$ 288,246
Trade names [Member]
Business Acquisition [Line Items]
Recognized identifiable assets acquired and liabilities assumed, finite-lived intangibles	$ 5,600
Fair value inputs, discount rate	10.00%
Finite-lived intangible asset, useful life (in years)	3 years
Customer relationships [Member]
Business Acquisition [Line Items]
Recognized identifiable assets acquired and liabilities assumed, finite-lived intangibles	$ 56,400
Fair value inputs, discount rate	10.00%
Finite-lived intangible asset, useful life (in years)	9 years
Backlog [Member]
Business Acquisition [Line Items]
Recognized identifiable assets acquired and liabilities assumed, finite-lived intangibles	$ 11,300
Fair value inputs, discount rate	8.00%
Finite-lived intangible asset, useful life (in years)	1 year
Technology-Based Intangible Assets [Member]
Business Acquisition [Line Items]
Recognized identifiable assets acquired and liabilities assumed, finite-lived intangibles	$ 181,246		$ 4,200
Fair value inputs, discount rate	9.00%
Finite-lived intangible asset, useful life (in years)			3 years
In Process research and development [Member]
Business Acquisition [Line Items]
Recognized identifiable assets acquired and liabilities assumed, finite-lived intangibles	$ 33,700
Fair value inputs, discount rate	12.00%
IPR&D projects		1
Estimated cost to complete in process research and development	$ 22,300
Minimum [Member] | Technology-Based Intangible Assets [Member]
Business Acquisition [Line Items]
Finite-lived intangible asset, useful life (in years)	4 years
Maximum [Member] | Technology-Based Intangible Assets [Member]
Business Acquisition [Line Items]
Finite-lived intangible asset, useful life (in years)	6 years