Contract Balances - Valuation And Qualifying Accounts Activity (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2023 USD ($)
Contract Balances
Balance at Beginning of Period	$ 44,431
Current Period Provision for Expected Credit Losses	54,655
Write-offs Charged Against Allowance	(47,380)
Balance at End of Period	$ 51,706