QUARTERLY FINANCIAL INFORMATION (UNAUDITED) (Details) - Schedule of quarterly financial information - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2014
Quarterly Financial Information Disclosure [Abstract]
Revenue	$ 500,705	$ 462,200	$ 500,107	$ 494,149	$ 502,158	$ 511,694	$ 500,020	$ 502,160	$ 1,957,161	$ 2,016,032	$ 1,991,811
Gross Profit	123,815	119,357	114,157	116,105	119,925	123,489	114,375	117,989	473,434	475,778	459,399
Net Income (loss)	$ 7,723	$ 7,596	$ 6,095	$ 8,596	$ 10,803	$ 10,893	$ 5,122	$ 7,471	$ 30,010	$ 34,289	$ (177)
Per Share - Basic (in Dollars per share)	$ 0.19	$ 0.19	$ 0.15	$ 0.20	$ 0.25	$ 0.25	$ 0.11	$ 0.16	$ 0.73	$ 0.77	$ 0.00
Per Share - Diluted (in Dollars per share)	$ 0.18	$ 0.18	$ 0.14	$ 0.19	$ 0.24	$ 0.23	$ 0.11	$ 0.04	$ 0.68	$ 0.73	$ 0.00