EMPLOYEE BENEFIT PLANS (Details) - Plan assets and benefit obligation of the defined benefit plans - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2013
Change in benefit obligation:
Plan participant contributions	$ 0
Actuarial (gain) loss	(2,746)
Change in plan assets:
Fair value of plan assets at beginning of fiscal year	154,966
Plan participant contributions	0
Fair value of plan assets at end of fiscal year	144,625	$ 154,966
Defined Benefits [Member]
Change in benefit obligation:
Benefit obligation at beginning of fiscal year	194,327	195,961
Benefits earned during the year	0	22
Interest cost	7,526	8,205	$ 7,977
Plan participant contributions	0	3
Benefits paid	(10,300)	(10,359)
Benefits paid - settlement	0	0
Plan settlement	0	(9,780)
Effect of foreign currency	0	37
Actuarial (gain) loss	(6,707)	10,238
Actuarial gain - settlement	0	0
Benefit obligation at end of fiscal year	184,846	194,327	195,961
Change in plan assets:
Fair value of plan assets at beginning of fiscal year	154,966	153,731
Actual return on plan assets	(1,711)	12,830
Plan participant contributions	0	3
Company contributions	1,670	7,433
Effect of foreign currency	0	26
Benefits paid	(10,300)	(10,359)
Benefits paid - settlement	0	0
Plan settlement	0	(8,698)
Fair value of plan assets at end of fiscal year	144,625	154,966	153,731
Projected benefit obligation in excess of plan assets	(40,221)	(39,361)
Amounts recognized in the statement of financial position consist of:
Accrued liabilities	0	0
Other liabilities (long-term)	(40,221)	(39,361)
Total Liabilities	(40,221)	(39,361)
Net actuarial losses	29,158	23,433
Prior service cost	2	2
Deferred taxes	(10,206)	(8,202)
Total Accumulated other comprehensive loss, net of tax	18,954	15,233
Net amount recognized at September 30,	(21,267)	(24,128)
Accumulated benefit obligations	184,846	194,327
Information for plans with accumulated benefit obligations in excess of plan assets:
ABO	184,846	194,327
PBO	184,846	194,327
Fair value of plan assets	144,625	154,966
Supplemental Benefits [Member]
Change in benefit obligation:
Benefit obligation at beginning of fiscal year	38,207	38,674
Benefits earned during the year	0	0
Interest cost	1,302	1,497	1,344
Plan participant contributions	0	0
Benefits paid	(4,082)	(4,083)
Benefits paid - settlement	0	0
Plan settlement	0	0
Effect of foreign currency	0	0
Actuarial (gain) loss	1,878	2,119
Actuarial gain - settlement	0	0
Benefit obligation at end of fiscal year	37,305	38,207	38,674
Change in plan assets:
Fair value of plan assets at beginning of fiscal year	0	0
Actual return on plan assets	0	0
Plan participant contributions	0	0
Company contributions	4,082	4,083
Effect of foreign currency	0	0
Benefits paid	(4,082)	(4,083)
Benefits paid - settlement	0	0
Fair value of plan assets at end of fiscal year	0	0	$ 0
Projected benefit obligation in excess of plan assets	(37,305)	(38,207)
Amounts recognized in the statement of financial position consist of:
Accrued liabilities	(4,056)	(4,058)
Other liabilities (long-term)	(33,249)	(34,149)
Total Liabilities	(37,305)	(38,207)
Net actuarial losses	21,139	20,420
Prior service cost	71	85
Deferred taxes	(7,423)	(7,177)
Total Accumulated other comprehensive loss, net of tax	13,787	13,328
Net amount recognized at September 30,	(23,518)	(24,879)
Accumulated benefit obligations	37,305	38,207
Information for plans with accumulated benefit obligations in excess of plan assets:
ABO	37,305	38,207
PBO	37,305	38,207
Fair value of plan assets	$ 0	$ 0