Quarterly report pursuant to Section 13 or 15(d)

Earnings Per Share (Details)

v3.10.0.1
Earnings Per Share (Details) - shares
3 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Earnings Per Share [Abstract]    
Basic weighted average shares outstanding (in shares) 64,827,000 65,866,000
Dilutive effect of employee stock options and unvested RSUs (in shares) 150,000 311,000
Denominator for diluted earnings per share 64,977,000 66,177,000
Restricted Stock Units (RSUs)    
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]    
Antidilutive securities excluded from computation of earnings per share, amount 282,000 0