Earnings Per Share (Details) - shares shares in Thousands	3 Months Ended		9 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Denominator:
Basic weighted average shares outstanding	65,766	65,901	65,836	65,900
Dilutive effect of employee stock options and unvested RSUs	428	1,197	364	1,103
Denominator for diluted earnings per share	66,194	67,098	66,200	67,003