CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
CONSOLIDATED BALANCE SHEETS
Allowance for doubtful accounts receivable, current (in dollars)	$ 6,161	$ 8,209
Common stock voting, par value (in dollars per share)	$ 0.0025	$ 0.0025
Common stock voting, shares authorized (in shares)	900,000,000	900,000,000
Common stock voting, shares issued (in shares)	267,224,622	266,618,566
Common stock voting, shares outstanding (in shares)	194,997,922	210,914,264
Treasury stock, shares (in shares)	72,226,700	55,704,302

Amount of allowance for credit loss on accounts receivable, classified as current.

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