FAIR VALUE DISCLOSURES (Tables)

6 Months Ended

12 Months Ended

Sep. 30, 2013

Sep. 30, 2012

Mar. 31, 2013

Fair Value [Abstract]

Schedule of fair value assets measured on non-recurring basis

	Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)		Balance as of September 30, 2013		Total Loss for the Three Months Ended September 30, 2013			Total Loss for the Six Months Ended September 30, 2013
Inventories	$	—	$	18,365	$	—	$	18,365	$	(1,539	)	$	(2,364	)
Assets held for sale	—		3,367		—		3,367		(950		)	(2,180		)
Total assets	$	—	$	21,732	$	—	$	21,732	$	(2,489	)	$	(4,544	)

	Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)		Balance as of September 30, 2012		Total Loss for the Three Months Ended September 30, 2012			Total Loss for the Six Months Ended September 30, 2012
Assets held for sale	$	—	$	1,961	$	—	$	1,961	$	(2,000	)	(3,889		)
Total assets	$	—	$	1,961	$	—	$	1,961	$	(2,000	)	$	(3,889	)

Schedule of fair value assets measured on recurring basis

	Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)		Balance as of September 30, 2013		Balance  Sheet Classification
Rabbi Trust investments	$	5,235	$	—	$	—	$	5,235	Other assets
Total assets	$	5,235	$	—	$	—	$	5,235
Contingent consideration:
Current	$	—	$	—	$	5,933	$	5,933	Other accrued liabilities
Long-term	—		—		30,499		30,499		Other liabilities and deferred credits
Total liabilities	$	—	$	—	$	36,432	$	36,432

	Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)		Balance as of March 31, 2013		Balance  Sheet Classification
Rabbi Trust investments	$	4,837	$	—	$	—	$	4,837	Other assets
Total assets	$	4,837	$	—	$	—	$	4,837
Contingent consideration	$	—	$	—	$	35,625	$	35,625	Other liabilities and deferred credits
Total liabilities	$	—	$	—	$	35,625	$	35,625

Schedule of fair value of debt

	September 30, 2013				March 31, 2013
	Carrying Value		Fair Value		Carrying Value		Fair Value
6¼% Senior Notes	$	450,000	$	468,000	$	450,000	$	484,875
Term Loan	228,107		228,107		230,625		230,625
3% Convertible Senior Notes	107,906		141,019		106,196		131,819
Revolving Credit Facility	45,000		45,000		—		—
Other	70		70		448		448
	$	831,083	$	882,196	$	787,269	$	847,767

Fair Value Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Table Text Block]

Balance as of March 31, 2013	$	35,625
Change in fair value of contingent consideration	807
Balance as of September 30, 2013	$	36,432