SHARE-BASED COMPENSATION (Narrative) (Details) - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2014
Share-Based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares available for future awards or grants	2,500,000.0
Proceeds from exercise of stock options		$ 1.1	$ 3.7
Stock Options [Member]
Share-Based Compensation Arrangement by Share-based Payment Award [Line Items]
Outstanding options maximum term	10 years
Total fair value of the shares vested	$ 0.5	$ 2.5	$ 2.8
Exercise of employee stock options (in shares)	0
Number of shares granted (in shares)	0	0	0
Restricted Stock [Member]
Share-Based Compensation Arrangement by Share-based Payment Award [Line Items]
Employee, vesting period	3 years
Employee, restriction period	3 years
Non-employee directors, award vesting period	13 months
Non-employee directors, award restriction period	13 months
Granted (in dollars per share)	$ 13.20
Performance Shares [Member]
Share-Based Compensation Arrangement by Share-based Payment Award [Line Items]
Employee, vesting period	3 years
Employee, restriction period	3 years
Granted (in dollars per share)	$ 15.63	$ 37.08	$ 53.55
Minimum [Member] | Stock Options [Member]
Share-Based Compensation Arrangement by Share-based Payment Award [Line Items]
Employee, vesting period	1 year
Maximum [Member] | Stock Options [Member]
Share-Based Compensation Arrangement by Share-based Payment Award [Line Items]
Employee, vesting period	4 years