FAIR VALUE MEASUREMENTS (Detail) In Thousands, unless otherwise specified	3 Months Ended						6 Months Ended			3 Months Ended	6 Months Ended
	Mar. 31, 2013 USD ($)	Mar. 31, 2013 Not Designated as Hedging Instrument [Member]	Mar. 31, 2013 Designated as Hedging Instrument [Member] EUR (€)	Mar. 31, 2013 Minimum [Member]	Mar. 31, 2013 Maximum [Member]	Mar. 31, 2013 Convertible Notes 2017 [Member] Fair Value, Inputs, Level 1 [Member] USD ($)	Mar. 31, 2013 Convertible Notes 2017 [Member]	Mar. 31, 2013 Senior Notes 2018 [Member] Fair Value, Inputs, Level 1 [Member] USD ($)	Mar. 31, 2013 Fair Value, Inputs, Level 1 [Member] USD ($)	Mar. 31, 2013 Fair Value, Inputs, Level 2 [Member] USD ($)	Mar. 31, 2013 Fair Value, Inputs, Level 2 [Member] USD ($)
Debt Instrument, Convertible, Effective Interest Rate							4.00%
Senior Notes, Noncurrent								$ 594,000
Convertible Debt, Fair Value Disclosures						108,800
Insurance Contracts Fair Value									3,941
Trading Securities, Fair Value Disclosure									2,453
Notional Amount of Foreign Currency Derivative Instruments Not Designated as Hedging Instruments	1,750
Derivative, Average Forward Exchange Rate		0.96
Gain (Loss) on Foreign Currency Derivative Instruments Not Designated as Hedging Instruments										(14)	(16)
Foreign Currency Contracts Duration				15 days	45 days
Notional Amount of Foreign Currency Cash Flow Hedge Derivatives	3,375
Foreign Currency Contract, Amount To Be Exchanged (in Euro)			2,500
Derivative, Forward Exchange Rate			1.35
Unrealized Gain on Foreign Currency Derivatives, before Tax	$ 171