RECONCILIATION OF GROSS MARGIN TO NON-GAAP GROSS MARGIN
(Unaudited, in thousands) | ||||||||||||||||
Three Months Ended June 30, | Six Months Ended June 30, | |||||||||||||||
2019 | 2018 | 2019 | 2018 | |||||||||||||
Gross profit | $ | 83,225 | $ | 77,564 | $ | 161,231 | $ | 149,059 | ||||||||
Gross margin | 55.1 | % | 55.5 | % | 55.1 | % | 55.4 | % | ||||||||
Adjustments to reconcile gross profit to non-GAAP gross profit: | ||||||||||||||||
Stock-based compensation expense | 663 | 480 | 1,193 | 913 | ||||||||||||
Amortization of acquisition-related intangible assets | 51 | 197 | 102 | 447 | ||||||||||||
Non-GAAP gross profit | $ | 83,939 | $ | 78,241 | $ | 162,526 | $ | 150,419 | ||||||||
Non-GAAP gross margin | 55.6 | % | 56.0 | % | 55.6 | % | 55.9 | % | ||||||||