Stock-Based Compensation (Tables) |
9 Months Ended | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Sep. 30, 2019 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Share-based Payment Arrangement, Noncash Expense [Abstract] | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Share-based Compensation Arrangements by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding [Table Text Block] |
Stock-based compensation expense consisted of the following:
Stock Options
During the nine months ended September 30, 2019, the Company granted a total of 394,730 stock options at a weighted average grant date fair value of $22.53. At September 30, 2019, unrecognized costs related to outstanding stock options totaled $11.6 million, before any related tax benefit. The unrecognized costs related to stock options are amortized over the related vesting period using the straight-line attribution method. Unrecognized costs related to stock options at September 30, 2019 are expected to be recognized over a weighted average period of 2.39 years.
Restricted Stock Units
During the nine months ended September 30, 2019, the Company granted 169,134 restricted stock units at an estimated average grant date fair value of $95.47. At September 30, 2019, unrecognized costs related to outstanding restricted stock units totaled $21.8 million, before any related tax benefit. The unrecognized costs related to restricted stock units are being amortized over the related vesting period using the straight-line attribution method. These unrecognized costs at September 30, 2019 are expected to be recognized over a weighted average period of 2.30 years.
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