EMPLOYEE BENEFIT PLANS (Detail) - Pension and post-retirement plan assets by asset category (USD $) In Thousands, unless otherwise specified	Sep. 30, 2012	Sep. 30, 2011
Defined Benefit Plan Fair Value Of Plan Assets	$ 160,833	$ 137,678
Cash and Cash Equivalents [Member] | Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan Fair Value Of Plan Assets	29
Cash and Cash Equivalents [Member] | Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plan Fair Value Of Plan Assets	0
Cash and Cash Equivalents [Member] | Fair Value, Inputs, Level 3 [Member]
Defined Benefit Plan Fair Value Of Plan Assets	0
Cash and Cash Equivalents [Member]
Defined Benefit Plan Fair Value Of Plan Assets	29
Short Term Investment Funds [Member] | Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan Fair Value Of Plan Assets	0	0
Short Term Investment Funds [Member] | Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plan Fair Value Of Plan Assets	5,231	667
Short Term Investment Funds [Member] | Fair Value, Inputs, Level 3 [Member]
Defined Benefit Plan Fair Value Of Plan Assets	0	0
Short Term Investment Funds [Member]
Defined Benefit Plan Fair Value Of Plan Assets	5,231	667
US Government Agencies Debt Securities [Member] | Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan Fair Value Of Plan Assets	0	382
US Government Agencies Debt Securities [Member] | Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plan Fair Value Of Plan Assets	2,899	2,741
US Government Agencies Debt Securities [Member] | Fair Value, Inputs, Level 3 [Member]
Defined Benefit Plan Fair Value Of Plan Assets	0	0
US Government Agencies Debt Securities [Member]
Defined Benefit Plan Fair Value Of Plan Assets	2,899	3,123
Debt Instruments [Member] | Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan Fair Value Of Plan Assets		0
Debt Instruments [Member] | Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plan Fair Value Of Plan Assets	30,616	14,876
Debt Instruments [Member] | Fair Value, Inputs, Level 3 [Member]
Defined Benefit Plan Fair Value Of Plan Assets	0	0
Debt Instruments [Member]
Defined Benefit Plan Fair Value Of Plan Assets	30,616	14,876
Equity Securities [Member] | Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan Fair Value Of Plan Assets	62,713	68,313
Equity Securities [Member] | Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plan Fair Value Of Plan Assets		3,841
Equity Securities [Member] | Fair Value, Inputs, Level 3 [Member]
Defined Benefit Plan Fair Value Of Plan Assets	0	0
Equity Securities [Member]
Defined Benefit Plan Fair Value Of Plan Assets	62,713	72,154
Commingled Funds [Member] | Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan Fair Value Of Plan Assets	0	0
Commingled Funds [Member] | Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plan Fair Value Of Plan Assets	50,105	46,858
Commingled Funds [Member] | Fair Value, Inputs, Level 3 [Member]
Defined Benefit Plan Fair Value Of Plan Assets	6,224	0
Commingled Funds [Member]
Defined Benefit Plan Fair Value Of Plan Assets	56,329	46,858
Limited Partnerships And Hedge Fund Investments [Member] | Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan Fair Value Of Plan Assets	0
Limited Partnerships And Hedge Fund Investments [Member] | Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plan Fair Value Of Plan Assets	0
Limited Partnerships And Hedge Fund Investments [Member] | Fair Value, Inputs, Level 3 [Member]
Defined Benefit Plan Fair Value Of Plan Assets	3,016
Limited Partnerships And Hedge Fund Investments [Member]
Defined Benefit Plan Fair Value Of Plan Assets	3,016
Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan Fair Value Of Plan Assets	62,742	68,695
Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plan Fair Value Of Plan Assets	88,851	68,983
Fair Value, Inputs, Level 3 [Member]
Defined Benefit Plan Fair Value Of Plan Assets	$ 9,240	$ 0