ACQUISITIONS (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended			6 Months Ended		12 Months Ended
	Dec. 31, 2015	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014	Mar. 31, 2015	Dec. 30, 2014	Oct. 17, 2014	Jun. 27, 2014
Acquisitions
Net sales		$ 954,774	$ 994,123	$ 1,914,412	$ 1,891,028
Goodwill		2,022,820		2,022,820		$ 2,019,225
Amortization of Acquired Contract Liabilities		30,404	14,865	65,502	23,832
Business Acquisition, Pro Forma Revenue		954,774	994,123	1,914,412	1,941,965
Business Acquisition, Pro Forma Net Income (Loss)		$ 61,612	$ 67,446	$ 124,343	$ 197,560
Business Acquisition, Pro Forma Earnings Per Share, Basic		$ 1.25	$ 1.32	$ 2.53	$ 3.85
Business Acquisition, Pro Forma Earnings Per Share, Diluted		$ 1.25	$ 1.32	$ 2.52	$ 3.83
Operating Income (Loss)		$ 110,047	$ 114,698	$ 217,913	$ 355,222
Tulsa [Member]
Acquisitions
Business Acquisition, Transaction Costs		5,000		5,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Cash and Equivalents							$ 160,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Inventory							78,660
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment							15,409
Goodwill							73,800
Business Combination, Liabilities Arising from Contingencies, Amount Recognized							74,132
Business Combination, Indemnification Assets, Amount as of Acquisition Date							68,941
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deferred Tax Assets Noncurrent							48,608
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Other Noncurrent Assets							68,941
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets							285,418
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Accounts Payable							1,782
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Other							16,810
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deferred Tax Liabilities Noncurrent							68,091
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities							$ 445,418
Amortization of Acquired Contract Liabilities				$ 358,735
NAAS [Member]
Acquisitions
Payments to Acquire Businesses, Gross		44,520				167
Business Acquisition, Transaction Costs								$ 654
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Cash and Equivalents								818
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Receivables								4,939
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Inventory								848
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment								216
Goodwill								25,217
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Other Noncurrent Assets								225
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets								49,263
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Accounts Payable								232
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Other								911
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities, Other								3,600
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities								4,743
GEActuation [Member]
Acquisitions
Payments to Acquire Businesses, Gross		$ 75,609				$ 6,000
Business Acquisition, Transaction Costs									$ 1,834
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Cash and Equivalents									4,608
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Receivables									35,376
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Inventory									49,585
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment									30,985
Goodwill									150,772
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles									26,472
Acquired Finite-lived Intangible Asset, Weighted Average Useful Life		12 years
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deferred Tax Assets Noncurrent									63,341
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Other Noncurrent Assets									2,023
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets									363,162
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Accounts Payable									17,734
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Other									37,483
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deferred Tax Liabilities Noncurrent									232,336
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities									287,553
Customer relationships | NAAS [Member]
Acquisitions
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles								$ 17,000
Acquired Finite-lived Intangible Asset, Weighted Average Useful Life		11 years
Subsequent Event [Member] | Fairchild [Member]
Acquisitions
Payments to Acquire Businesses, Gross	$ 54,593
Warranty [Member] | GEActuation [Member]
Acquisitions
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Other									$ 24,514