v3.5.0.2
Stock-Based Compensation - Restricted Stock Units Activity (Details) - Restricted Stock Units (RSUs)
$ / shares in Units, $ in Millions
 9 Months Ended
Sep. 30, 2016
USD ($)
$ / shares
shares
Number of RSUs  
Outstanding beginning balance (in shares) | shares 1,727,300
Granted (in shares) | shares 623,000
Vested and issued (in shares) | shares (342,500)
Forfeited (in shares) | shares (162,100)
Outstanding ending balance (in shares) | shares 1,845,700
Vested and unissued, ending balance (in shares) | shares 624,300
Weighted Average Grant Date Fair Value per Share  
Outstanding beginning balance (in dollars per share) | $ / shares $ 34.15
Granted (in dollars per share) | $ / shares 45.09
Vested and Issued (in dollars per share) | $ / shares 30.21
Forfeited (in dollars per share) | $ / shares 38.61
Outstanding ending balance (in dollars per share) | $ / shares 37.38
Vested and unissued (in dollars per share) | $ / shares $ 31.25
Weighted Average Remaining Contractual Term (years), Other stock awards 1 year
Aggregate Intrinsic Value, Other stock awards | $ $ 93.1