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CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME
Net income, as reported	$ 1,409,594	$ 1,107,835	$ 993,004
Other comprehensive income (loss):
Change in foreign currency translation adjustment, net of tax	35,531	194	(16,957)
Available-for-sale investments:
Change in net unrealized gains (losses)	(110)	283	752
Net change in available-for-sale investments	(110)	283	752
Other comprehensive income (loss)	35,421	477	(16,205)
Comprehensive income	$ 1,445,015	$ 1,108,312	$ 976,799

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Amount after tax of increase (decrease) in equity from transactions and other events and circumstances from net income and other comprehensive income, attributable to parent entity. Excludes changes in equity resulting from investments by owners and distributions to owners.

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