FAIR VALUE MEASUREMENTS - Additional Information (Detail)	3 Months Ended			1 Months Ended
	Nov. 30, 2011 USD ($)	Nov. 30, 2011 EUR (€)	Nov. 30, 2011 GBP (£)	Nov. 30, 2011 Foreign currency forward contract USD ($)	May 31, 2011 Foreign currency forward contract USD ($)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cross-currency swap, fair value of liability	$ 14,000,000
Unsecured senior note, interest rate	6.70%
Unsecured senior note, maturity date	Nov. 01, 2015
Effective euro fixed-rate borrowing	5.31%
Notional principal amount of cross-currency swap	150,000,000	125,000,000
Assets measured at fair value on a recurring basis				12,000	6,200,000
Foreign currency forward contract, maturity date				Mar. 30, 2012	Nov. 23, 2011
Gain on exchange of notional amounts at maturity, offset by change in exchange rate	500,000
Foreign currency forward contract, USD purchased	90,300,000
Foreign currency forward contract, Euro sold		€ 59,900,000	£ 6,100,000