EMPLOYEE BENEFIT PLANS (Detail) - Estimated future benefit payments to retirees (USD $) In Thousands, unless otherwise specified	Sep. 30, 2012
Pension Plans, Defined Benefit [Member]
2013	$ 10,455
2014	10,789
2015	10,965
2016	11,208
2017	11,410
2018 through 2022	61,319
Supplemental Benefits [Member]
2013	3,951
2014	3,951
2015	3,832
2016	3,778
2017	3,720
2018 through 2022	$ 14,680

The amount of the aggregate benefits expected to be paid in the five fiscal years thereafter (the aggregate amount of benefits expected to be paid in years 6 through 10 after the date of the latest statement of financial position).

No definition available.

Name:	us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsInFiveFiscalYearsThereafter
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant