Contract Balances (Tables)

3 Months Ended

Mar. 31, 2022

Contract With Customer Asset And Liability [Abstract]

Schedule of Accounts Receivable

Accounts receivable (in thousands) consisted of the following, as of:

	March 31,			December 31,
	2022			2021
Billed and billable	$	129,623		$	192,055
Less: allowance for credit losses		(2,693	)		(2,775	)
Accounts receivable, net	$	126,930		$	189,280

Deferred Revenue and Advance Payments

Deferred revenue and advance payments (in thousands) from customers consisted of the following, as of:

	March 31,		December 31,
	2022		2021
Current:
Deferred product licenses revenue	$	1,090	$	993
Deferred subscription services revenue		34,185		35,589
Deferred product support revenue		166,119		166,477
Deferred other services revenue		4,823		6,801
Total current deferred revenue and advance payments	$	206,217	$	209,860
Non-current:
Deferred product licenses revenue	$	80	$	68
Deferred subscription services revenue		2,153		1,064
Deferred product support revenue		5,368		6,203
Deferred other services revenue		635		754
Total non-current deferred revenue and advance payments	$	8,236	$	8,089