Earnings Per Share (Details) - shares shares in Thousands	3 Months Ended		9 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Earnings Per Share [Abstract]
Basic weighted average shares outstanding	65,571	65,766	65,637	65,836
Dilutive effect of employee stock options and unvested RSUs	511	428	386	364
Denominator for diluted earnings per share	66,082	66,194	66,023	66,200