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Stock Repurchase	9 Months Ended
Stock Repurchase	Jun. 30, 2018
Stock Repurchase [Abstract]
Stock Repurchases	STOCK REPURCHASES On February 6, 2018, our board of directors authorized a buyback program authorizing the Company to repurchase up to $100.0 million of our common stock from time to time through January 31, 2019. During the three and nine months ended June 30, 2018, we repurchased and retired 574,946 shares of outstanding common stock under this plan at an average price of $173.91 per share for a total of $100.0 million.