| RECONCILIATION OF GROSS MARGIN TO NON-GAAP GROSS MARGIN | ||||||||||||||||
| (Unaudited, in thousands) | ||||||||||||||||
|
Three Months Ended
September 30, |
Nine Months Ended
September 30, | |||||||||||||||
| 2017 | 2016 | 2017 | 2016 | |||||||||||||
| Gross profit | $ | 70,856 | $ | 57,925 | $ | 187,122 | $ | 154,361 | ||||||||
| Gross margin | 55.0 | % | 54.4 | % | 54.8 | % | 54.2 | % | ||||||||
| Adjustments to reconcile gross profit to non-GAAP gross profit: | ||||||||||||||||
| Stock-based compensation expense | 453 | 403 | 1,264 | 1,217 | ||||||||||||
| Amortization of acquisition-related intangible assets | 513 | 513 | 1,538 | 1,538 | ||||||||||||
| Non-GAAP gross profit | $ | 71,822 | $ | 58,841 | $ | 189,924 | $ | 157,116 | ||||||||
| Non-GAAP gross margin | 55.7 | % | 55.3 | % | 55.6 | % | 55.1 | % | ||||||||
| RECONCILIATION OF OPERATING EXPENSES TO NON-GAAP OPERATING EXPENSES | ||||||||||||||||
| (Unaudited, in thousands) | ||||||||||||||||
|
Three Months Ended
September 30, |
Nine Months Ended
September 30, | |||||||||||||||
| 2017 | 2016 | 2017 | 2016 | |||||||||||||
| Total operating expenses | $ | 47,024 | $ | 42,924 | $ | 134,751 | $ | 117,457 | ||||||||
| Adjustments to reconcile total operating expenses to non-GAAP total operating expenses: | ||||||||||||||||
| Stock-based compensation expense | (13,516 | ) | (13,113 | ) | (39,495 | ) | (33,024 | ) | ||||||||
| Deferred compensation plan expense | (585 | ) | (418 | ) | (1,992 | ) | (879 | ) | ||||||||
| Non-GAAP operating expenses | $ | 32,923 | $ | 29,393 | $ | 93,264 | $ | 83,554 | ||||||||
