Accounts Receivable (Details) - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
Components of accounts receivable
Accounts receivable, gross	$ 172,729	$ 158,455
Allowance for doubtful accounts	(36,462)	(38,939)
Accounts receivable - affiliates, net	136,267	119,516
Affiliated Entity
Components of accounts receivable
Accounts receivable, gross	20,410	22,472
Allowance for doubtful accounts	(708)	(731)
Accounts receivable - affiliates, net	19,702	21,741
Retainage receivables	802	2,179
Billed
Components of accounts receivable
Accounts receivable, gross	112,646	112,441
Billed | Customer in Libya
Components of accounts receivable
Accounts receivable, gross	23,479	24,031
Billed | Affiliated Entity
Components of accounts receivable
Accounts receivable, gross	3,755	10,229
Unbilled
Components of accounts receivable
Accounts receivable, gross	60,083	46,014
Unbilled | Affiliated Entity
Components of accounts receivable
Accounts receivable, gross	$ 16,655	$ 12,243