(Unaudited, in thousands)
| Three Months Ended December 31, | Year Ended December 31, | |||||||||||||||
| 2020 | 2019 | 2020 | 2019 | |||||||||||||
| Total operating expenses | $ | 88,911 | $ | 61,242 | $ | 307,072 | $ | 243,763 | ||||||||
| Adjustments to reconcile total operating expenses to non-GAAP total operating expenses: | ||||||||||||||||
| Stock-based compensation expense | (22,284 | ) | (18,106 | ) | (82,959 | ) | (76,290 | ) | ||||||||
| Deferred compensation plan expense | (3,047 | ) | (1,383 | ) | (4,719 | ) | (3,941 | ) | ||||||||
| Non-GAAP operating expenses | $ | 63,580 | $ | 41,753 | $ | 219,394 | $ | 163,532 | ||||||||
RECONCILIATION OF OPERATING INCOME TO NON-GAAP OPERATING INCOME
(Unaudited, in thousands)
| Three Months Ended December 31, | Year Ended December 31, | |||||||||||||||
| 2020 | 2019 | 2020 | 2019 | |||||||||||||
| Total operating income | $ | 39,963 | $ | 30,694 | $ | 158,882 | $ | 102,562 | ||||||||
| Adjustments to reconcile total operating income to non-GAAP total operating income: | ||||||||||||||||
| Stock-based compensation expense | 22,970 | 18,680 | 85,551 | 78,699 | ||||||||||||
| Amortization of acquisition-related intangible assets | - | - | - | 110 | ||||||||||||
| Deferred compensation plan expense | 3,328 | 1,412 | 5,650 | 3,995 | ||||||||||||
| Non-GAAP operating income | $ | 66,261 | $ | 50,786 | $ | 250,083 | $ | 185,366 | ||||||||
