RECONCILIATION OF GROSS MARGIN TO NON-GAAP GROSS MARGIN | |||||||||||||||
(Unaudited, in thousands) | |||||||||||||||
Three Months Ended
September 30, |
Nine Months Ended
September 30, | ||||||||||||||
2019 | 2018 | 2019 | 2018 | ||||||||||||
Gross profit | $ | 93,158 | $ | 89,018 | $ | 254,389 | $ | 238,075 | |||||||
Gross margin | 55.2 | % | 55.6 | % | 55.2 | % | 55.5 | % | |||||||
Adjustments to reconcile gross profit to non-GAAP gross profit: | |||||||||||||||
Stock-based compensation expense | 641 | 471 | 1,834 | 1,384 | |||||||||||
Deferred compensation plan expense | 25 | - | 25 | - | |||||||||||
Amortization of acquisition-related intangible assets | 8 | 197 | 110 | 644 | |||||||||||
Non-GAAP gross profit | $ | 93,832 | $ | 89,686 | $ | 256,358 | $ | 240,103 | |||||||
Non-GAAP gross margin | 55.6 | % | 56.1 | % | 55.6 | % | 56.0 | % | |||||||