| RECONCILIATION OF OPERATING INCOME TO NON-GAAP OPERATING INCOME | ||||||||||||||||
| (Unaudited, in thousands) | ||||||||||||||||
|
Three Months Ended
September 30, |
Nine Months Ended
September 30, | |||||||||||||||
| 2017 | 2016 | 2017 | 2016 | |||||||||||||
| Total operating income | $ | 23,832 | $ | 15,001 | $ | 52,371 | $ | 36,904 | ||||||||
| Operating income as a percentage of revenue | 18.5 | % | 14.1 | % | 15.3 | % | 12.9 | % | ||||||||
| Adjustments to reconcile total operating income to non-GAAP total operating income: | ||||||||||||||||
| Stock-based compensation expense | 13,969 | 13,516 | 40,759 | 34,241 | ||||||||||||
| Amortization of acquisition-related intangible assets | 513 | 513 | 1,538 | 1,538 | ||||||||||||
| Deferred compensation plan expense | 585 | 418 | 1,992 | 879 | ||||||||||||
| Non-GAAP operating income | $ | 38,899 | $ | 29,448 | $ | 96,660 | $ | 73,562 | ||||||||
| Non-GAAP operating income as a percentage of revenue | 30.2 | % | 27.7 | % | 28.3 | % | 25.8 | % | ||||||||
| RECONCILIATION OF INTEREST AND OTHER INCOME, NET, TO NON-GAAP INTEREST AND OTHER INCOME, NET | ||||||||||||||||
| (Unaudited, in thousands) | ||||||||||||||||
|
Three Months Ended
September 30, |
Nine Months Ended
September 30, | |||||||||||||||
| 2017 | 2016 | 2017 | 2016 | |||||||||||||
| Total interest and other income, net | $ | 1,255 | $ | 780 | $ | 3,873 | $ | 1,920 | ||||||||
| Adjustments to reconcile interest and other income to non-GAAP interest and other income: | ||||||||||||||||
| Deferred compensation plan income | (635 | ) | (488 | ) | (1,902 | ) | (1,097 | ) | ||||||||
| Non-GAAP interest and other income, net | $ | 620 | $ | 292 | $ | 1,971 | $ | 823 | ||||||||
