| RECONCILIATION OF OPERATING EXPENSES TO NON-GAAP OPERATING EXPENSES | ||||||||||||||||
| (Unaudited, in thousands) | ||||||||||||||||
|
Three Months Ended
December 31, |
Year Ended
December 31, | |||||||||||||||
| 2019 | 2018 | 2019 | 2018 | |||||||||||||
| Total operating expenses | $ | 61,242 | $ | 51,516 | $ | 243,763 | $ | 209,180 | ||||||||
| Adjustments to reconcile total operating expenses to non-GAAP total operating expenses: | ||||||||||||||||
| Stock-based compensation expense | (18,106 | ) | (14,338 | ) | (76,290 | ) | (58,719 | ) | ||||||||
| Deferred compensation plan (expense) income | (1,383 | ) | 1,513 | (3,941 | ) | 591 | ||||||||||
| Non-GAAP operating expenses | $ | 41,753 | $ | 38,691 | $ | 163,532 | $ | 151,052 | ||||||||
