Fair Value of Financial Instruments - Other Investments - Other Equity Method Investments - Narrative (Details) - USD ($)	3 Months Ended		27 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Mar. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Fair Value, Financial Instruments Measured on a Non-Recurring Basis [Line Items]
Equity method investments, net investment	$ 307,000,000		$ 307,000,000	$ 306,000,000
Equity method investments, equity contributions	0	$ 500,000
Equity method investments, equity in earnings (losses)	9,152,000	6,777,000
Telecommunications Equity Method Investees
Fair Value, Financial Instruments Measured on a Non-Recurring Basis [Line Items]
Equity method investments, net investment	22,000,000	22,000,000	22,000,000	21,000,000
Equity method investments, equity contributions	0	500,000
Equity method investments, equity in earnings (losses)	1,100,000	(300,000)
Payments for advance to affiliate	0
Telecommunications Equity Method Investees | Subcontracting Arrangements
Fair Value, Financial Instruments Measured on a Non-Recurring Basis [Line Items]
Expenses, related party	400,000	1,000,000
Payables, related party	100,000		100,000	200,000
Telecommunications Equity Method Investees | Employee Leasing and Advanced Receivable Arrangement
Fair Value, Financial Instruments Measured on a Non-Recurring Basis [Line Items]
Receivables, related party	3,800,000		3,800,000	3,800,000
FM Tech
Fair Value, Financial Instruments Measured on a Non-Recurring Basis [Line Items]
Equity method investments, net investment	$ 18,000,000	18,000,000	$ 18,000,000
Equity method investments, ownership percentage	50.00%		50.00%
Certain Entities, Each Accounted for Using Equity Method Investments
Fair Value, Financial Instruments Measured on a Non-Recurring Basis [Line Items]
Equity method investments, net investment	$ 3,000,000	3,000,000	$ 3,000,000
Equity method investments, equity in earnings (losses)	(100,000)	(100,000)
Expenses, related party	300,000	3,600,000
Payables, related party	$ 100,000		$ 100,000
Equity method investments, ownership percentage	49.00%		49.00%
Line of credit, amount drawn	$ 3,000,000		$ 3,000,000	4,500,000
Certain Entities, Each Accounted for Using Equity Method Investments | Other Current Assets
Fair Value, Financial Instruments Measured on a Non-Recurring Basis [Line Items]
Line of credit, amount drawn	0		0	$ 600,000
Confluence
Fair Value, Financial Instruments Measured on a Non-Recurring Basis [Line Items]
Equity method investments, equity contributions	200,000	0	$ 2,100,000
Equity method investments, equity in earnings (losses)	$ (100,000)	$ (200,000)
Equity method investments, ownership percentage	75.00%		75.00%
Financing commitments (up to)					$ 2,500,000
AVCT | Common Stock
Fair Value, Financial Instruments Measured on a Non-Recurring Basis [Line Items]
Equity securities, fair value	$ 200,000		$ 200,000