Quarterly report pursuant to Section 13 or 15(d)

Stock-Based Compensation (ResSt) (Details)

v3.7.0.1
Stock-Based Compensation (ResSt) (Details)
$ / shares in Units, $ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2017
USD ($)
item
$ / shares
shares
Mar. 31, 2017
$ / shares
shares
Jun. 30, 2017
USD ($)
item
$ / shares
shares
Unvested restricted stock units and awards      
Stock-Based compensation      
Award vesting rights proportion (as a percent)     33.00%
Number of vesting rights anniversaries | item 3   3
Number of Shares      
Balance at the beginning of the period (in shares) | shares 2,221,044 1,894,759 1,894,759
Granted (in shares) | shares 47,700 872,941  
Vested (in shares) | shares (199,163) (526,572)  
Forfeited (in shares) | shares (45,683) (20,084)  
Balance at the end of the period (in shares) | shares 2,023,898 2,221,044 2,023,898
Weighted-Average Grant Date Fair Value per Share      
Balance at the beginning of the period (in dollars per share) | $ / shares $ 31.98 $ 30.40 $ 30.40
Granted (in dollars per share) | $ / shares 35.05 31.89  
Vested (in dollars per share) | $ / shares 30.59 31.68  
Forfeited (in dollars per share) | $ / shares 30.11 27.52  
Balance at the end of the period (in dollars per share) | $ / shares $ 32.17 $ 31.98 $ 32.17
Additional disclosures      
Unrecognized compensation expense related to shares | $ $ 56,907   $ 56,907
Unrecognized compensation expense weighted-average recognition period     2 years 2 months 12 days
Stock options      
Additional disclosures      
Unrecognized compensation expense weighted-average recognition period     1 year 10 months 24 days