Quarterly report pursuant to Section 13 or 15(d)

Share-Based Payments Share-Based Payments - Restricted Stock Activity (Details)

v3.8.0.1
Share-Based Payments Share-Based Payments - Restricted Stock Activity (Details) - All Plans - Restricted Stock
3 Months Ended
Dec. 31, 2017
$ / shares
shares
Shares  
Non-vested at beginning of period (in shares) | shares 501,184
Granted (in shares) | shares 234,100
Vested (in shares) | shares (168,280)
Expired or forfeited (in shares) | shares (5,214)
Non-vested at end of period (in shares) | shares 561,790
Weighted- average Grant-date Fair Value  
Non-vested weighted-average grant-date fair value, beginning of period (in dollars per share) | $ / shares $ 53.65
Granted, weighted-average grant-date fair value (in dollars per share) | $ / shares 57.05
Vested, weighted-average grant-date fair value (in dollars per share) | $ / shares 51.54
Expired or forfeited, weighted-average grant-date fair value (in dollars per share) | $ / shares 59.51
Non-vested weighted-average grant-date fair value, end of period (in dollars per share) | $ / shares $ 55.64