Quarterly report pursuant to Section 13 or 15(d)

Stock-Based Compensation (ResSt) (Details)

v3.3.0.814
Stock-Based Compensation (ResSt) (Details)
$ / shares in Units, $ in Thousands
 3 Months Ended 6 Months Ended 9 Months Ended
Mar. 31, 2015
$ / shares
shares
Jun. 30, 2015
$ / shares
shares
Sep. 30, 2015
USD ($)
item
$ / shares
shares
Restricted Stock      
Stock-Based compensation      
Award vesting rights proportion (as a percent)     33.00%
Number of vesting rights anniversaries | item     3
Number of Shares      
Balance at the beginning of the period (in shares) 1,098,674 1,098,674 1,098,674
Granted (in shares) 207,531   2,000
Vested (in shares) (358,166)   (17,126)
Forfeited (in shares) (6,628) (5,869) (2,414)
Balance at the end of the period (in shares) 941,411 935,542 918,002
Weighted-Average Grant Date Fair Value per Share      
Balance at the beginning of the period (in dollars per share) | $ / shares $ 33.72 $ 33.72 $ 33.72
Granted (in dollars per share) | $ / shares 53.89   45.21
Vested (in dollars per share) | $ / shares 20.44   30.29
Forfeited (in dollars per share) | $ / shares 33.53 45.98 44.84
Balance at the end of the period (in dollars per share) | $ / shares $ 38.61 $ 43.18 $ 43.42
Additional disclosures      
Unrecognized compensation expense related to unvested restricted stock | $     $ 17,012
Unrecognized compensation expense weighted-average recognition period     2 years
Restricted stock with performance and subsequent service conditions      
Additional disclosures      
Unrecognized compensation expense related to unvested restricted stock | $     $ 1,146
Unrecognized compensation expense weighted-average recognition period     1 year 6 months
Unvested restricted stock, service condition     2 years