Quarterly report pursuant to Section 13 or 15(d)

Share-Based Payments - Stock Option Activity (Details)

v3.5.0.2
Share-Based Payments - Stock Option Activity (Details) - All Plans - Employee Stock Option
$ / shares in Units, $ in Thousands
 9 Months Ended
Jun. 30, 2016
USD ($)
$ / shares
shares
Share-based Compensation Arrangement by Share-based Payment Award, Options, Nonvested, Number of Shares [Roll Forward]  
Outstanding, beginning of period (in shares) | shares 337,938
Exercised (in shares) | shares (131,261)
Expired or forfeited (in shares) | shares (98,745)
Outstanding, end of period (in shares) | shares 107,932
Exercisable (in shares) | shares 30,766
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Abstract]  
Outstanding, weighted-average exercise price, beginning of period (in dollars per share) | $ / shares $ 39.19
Exercised, weighted-average exercise price (in dollars per share) | $ / shares 39.47
Expired or forfeited, weighted-average exercise price (in dollars per share) | $ / shares 37.33
Outstanding, weighted-average exercise price, end of period (in dollars per share) | $ / shares 40.56
Exercisable, weighted-average exercise price (in dollars per share) | $ / shares $ 40.56
Outstanding, weighted-average remaining contractual term (in years) 4 months 13 days
Outstanding, aggregate intrinsic value | $ $ 1,628
Exercisable, weighted-average remaining contractual term (in years) 4 months 13 days
Exercisable, aggregate intrinsic value | $ $ 464