Accounts Receivable and Allowance for Expected Credit Losses - Accounts Receivable, Net (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Accounts receivable:
Billed receivables	$ 804,914	$ 745,371
Unbilled receivables	422,372	421,488
Allowance for expected credit losses	(69,821)	(64,717)
Accounts receivable, net	$ 1,157,465	$ 1,102,142

Amount, before allowance for credit loss, of right to consideration from customer for product sold and service rendered in normal course of business, classified as current.

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Amount, after allowance for credit loss, of right to consideration from customer for product sold and service rendered in normal course of business, classified as current.

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

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Amount received for services rendered and products shipped, but not yet billed, for non-contractual agreements due within one year or the normal operating cycle, if longer.

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