RECONCILIATION OF OPERATING EXPENSES TO NON-GAAP OPERATING EXPENSES
(Unaudited, in thousands) | ||||||||||||||||
Three Months Ended June 30, | Six Months Ended June 30, | |||||||||||||||
2019 | 2018 | 2019 | 2018 | |||||||||||||
Total operating expenses | $ | 63,106 | $ | 52,682 | $ | 119,395 | $ | 102,141 | ||||||||
Adjustments to reconcile total operating expenses to non-GAAP total operating expenses: | ||||||||||||||||
Stock-based compensation expense | (22,046 | ) | (15,412 | ) | (37,526 | ) | (30,008 | ) | ||||||||
Deferred compensation plan expense | (772 | ) | (410 | ) | (2,571 | ) | (273 | ) | ||||||||
Non-GAAP operating expenses | $ | 40,288 | $ | 36,860 | $ | 79,298 | $ | 71,860 | ||||||||