Quarterly report pursuant to Section 13 or 15(d)

Share-Based Payments - Restricted Stock Activity (Details)

v3.5.0.2
Share-Based Payments - Restricted Stock Activity (Details) - All Plans - Restricted Stock
 9 Months Ended
Jun. 30, 2016
$ / shares
shares
Restricted stock activity [Roll Forward]  
Non-vested at beginning of period (in shares) | shares 570,567
Granted (in shares) | shares 227,125
Vested (in shares) | shares (266,950)
Expired or forfeited (in shares) | shares (4,665)
Non-vested at end of period (in shares) | shares 526,077
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract]  
Non-vested weighted-average grant-date fair value, beginning of period (in dollars per share) | $ / shares $ 33.66
Granted, weighted-average grant-date fair value (in dollars per share) | $ / shares 51.89
Vested, weighted-average grant-date fair value (in dollars per share) | $ / shares 30.56
Expired or forfeited, weighted-average grant-date fair value (in dollars per share) | $ / shares 45.71
Non-vested weighted-average grant-date fair value, end of period (in dollars per share) | $ / shares $ 45.16