Stock-Based Compensation

9 Months Ended

Sep. 30, 2017

Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]

Stock-Based Compensation

NOTE 8.  STOCK-BASED COMPENSATION

Stock-based compensation granted under our Company’s stock plans is expensed in tranches over the vesting period. Non-performance based grants generally vest equally over a three or four-year period. Performance units generally cliff vest three years after they are granted. For the nine months ended September 30, 2017, we granted 279,630 stock incentive units at a weighted average grant price of $55.74. Each performance unit and restricted stock unit represents a contingent right to receive one share of Common Stock as of the vesting date. Such Common Stock may be subject to forfeiture for the payment of any required tax withholding.