FAIR VALUE MEASUREMENTS (Tables)

12 Months Ended

Mar. 31, 2012

Fair Value Disclosures [Abstract]

Assets and liabilities reported at fair value and measured on a recurring basis

				March 31, 2012
				Quoted Prices in Active Markets for Identical Assets		Significant Other Observable Inputs		Significant Unobservable Inputs
Description	Total			(Level 1)		(Level 2)		(Level 3)
Contingent consideration liabilities	$	(2,019	)	$	—	$	—	$	(2,019	)
Derivative assets	$	212		$	—	$	212	$	—

				March 31, 2011
				Quoted Prices in Active Markets for Identical Assets		Significant Other Observable Inputs			Significant Unobservable Inputs
Description	Total			(Level 1)		(Level 2)			(Level 3)
Contingent consideration liabilities	$	(2,870	)	$	—	$	—		$	(2,870	)
Derivative liabilities	$	(377	)	$	—	$	(377	)	$	—

Schedule of carrying amounts and the related estimated fair values of financial instruments

	March 31, 2012					March 31, 2011
	Carrying Value		Fair Value			Carrying Value			Fair Value
Long-term debt	$	1,158,862	$	1,385,264	1,312,004,000	$	1,312,004	1,483,796,000	$	1,483,796

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

Schedule of Derivatives Instruments Statements of Financial Performance and Financial Position, Location [Table Text Block]

		Amount of Gain (Loss) in OCI (Effective Portion) Year ended March 31,						Reclassification Adjustment Gain (Loss) Amount Year ended March 31,
	Reclassification Adjustment Gain (Loss) Location (Effective Portion)
Cash Flow Hedges		2012			2011			2012		2011
Derivatives	Interest expense and other	$	(364	)	$	(1,188	)	$	156	$	(2,282	)

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

	March 31, 2011 Balance		Net Purchases (Sales), Issues (Settlements)		Net Realized Appreciation (Depreciation)			Net Unrealized Appreciation (Depreciation)		March 31, 2012 Balance
Contingent consideration	$	2,870	$	1,926	$	(2,777	)	$	—	$	2,019

	March 31, 2010 Balance		Net Purchases (Sales), Issues (Settlements)		Net Realized Appreciation (Depreciation)		Net Unrealized Appreciation (Depreciation)		March 31, 2011 Balance
Contingent consideration	$	2,545	$	—	$	325	$	—	$	2,870