RECONCILIATION OF OPERATING INCOME TO NON-GAAP OPERATING INCOME
(Unaudited, in thousands)

		Three Months Ended June 30,								Six Months Ended June 30,
		2021				2020				2021				2020
Total operating income		$	60,628			$	27,955			$	106,714			$	58,941
Adjustments to reconcile total operating income to non-GAAP total operating income:
Stock-based compensation expense			32,126				21,044				60,710				39,606
Deferred compensation plan expense			2,152				4,032				3,272				377
Non-GAAP operating income		$	94,906			$	53,031			$	170,696			$	98,924