SHAREHOLDERS' EQUITY (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2014
Repurchase of common stock (in shares)	0	810,097	0
Aggregate cost of treasury shares purchase		$ 59,654
Maximum
Number of common shares authorized to be repurchased	4,000,000