EMPLOYEE BENEFIT PLANS (Details) (USD $)	12 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2012
EMPLOYEE BENEFIT PLANS
Accumulated Benefit Obligation	$ 111,108,000	$ 102,680,000
Changes in projected benefit obligations
Projected benefit obligation at beginning of year	102,680,000	112,062,000
Interest cost	4,763,000	4,339,000	4,498,000
Actuarial (gain) loss	10,787,000	(9,320,000)
Benefits paid	(7,122,000)	(4,401,000)
Projected benefit obligation at end of year	111,108,000	102,680,000	112,062,000
Change in plan assets
Fair value of plan assets at beginning of year	96,818,000	86,718,000
Actual return on plan assets	11,132,000	12,369,000
Employer contribution	7,329,000	2,132,000
Benefits paid	(7,122,000)	(4,401,000)
Fair value of plan assets at end of year	108,157,000	96,818,000	86,718,000
Funded status of the plan at end of year	(2,951,000)	(5,862,000)
Amounts Recognized in the Consolidated Balance Sheets
Accrued liabilities	(62,000)	(145,000)
Noncurrent liabilities-other	(2,889,000)	(5,717,000)
Net amount recognized	(2,951,000)	(5,862,000)
Amounts recognized in accumulated other comprehensive income and not yet reflected in net periodic benefit cost
Net actuarial loss	(23,405,000)	(19,210,000)
Net actuarial loss, which is expected to be amortized in next year's periodic benefit cost	1,200,000
Weighted average assumptions used for the pension calculations
Discount rate for net periodic benefit costs (as a percent)	4.80%	4.06%	4.33%
Discount rate for year-end obligations (as a percent)	4.32%	4.80%	4.06%
Expected return on plan assets (as a percent)	6.61%	7.06%	7.16%
Components of the net periodic pension expense (benefit)
Interest cost	4,763,000	4,339,000	4,498,000
Expected return on plan assets	(6,789,000)	(6,099,000)	(5,463,000)
Amortization of prior service cost		1,000	2,000
Recognized net actuarial loss	873,000	2,372,000	3,567,000
Pension settlement charges	1,376,000
Net pension expense (benefit)	223,000	613,000	2,604,000
Expected benefits to be paid from the Pension Plan
2015	5,510,000
2016	6,416,000
2017	5,642,000
2018	6,999,000
2019	7,559,000
2020-2024	36,032,000
Total	68,158,000
PLAN ASSETS
Target Allocation (as a percent)	100.00%
Percentage of Plan Assets	100.00%	100.00%
Estimated contributions
PLAN ASSETS
Estimated contribution by the employer in next fiscal year to Pension Plan	$ 100,000
U.S. equities
PLAN ASSETS
Target Allocation (as a percent)	55.00%
Percentage of Plan Assets	61.00%	58.00%
International equities
PLAN ASSETS
Target Allocation (as a percent)	15.00%
Percentage of Plan Assets	12.00%	13.00%
Fixed income
PLAN ASSETS
Target Allocation (as a percent)	27.00%
Percentage of Plan Assets	25.00%	27.00%
Real estate and other
PLAN ASSETS
Target Allocation (as a percent)	3.00%
Percentage of Plan Assets	2.00%	2.00%