Business Segments and Geographic Information - Additional Information (Details) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020 USD ($)	Jun. 30, 2019 USD ($)	Jun. 30, 2020 USD ($) Segment	Jun. 30, 2019 USD ($)	Dec. 31, 2019 USD ($)
Schedule Of Equity Method Investments [Line Items]
Number of reportable business segments | Segment			4
Equity in earnings (losses) of affiliates, net of income tax provision	$ 2,699	$ 1,821	$ 4,959	$ 4,417
SACS
Schedule Of Equity Method Investments [Line Items]
Ownership percentage in entity			50.00%
Equity in earnings (losses) of affiliates, net of income tax provision			$ 1,900	2,600
Investment in joint venture	9,500		9,500		$ 12,300
GEOAmey
Schedule Of Equity Method Investments [Line Items]
Equity in earnings (losses) of affiliates, net of income tax provision			3,100	$ 1,800
Advances to affiliate	$ 8,300		$ 8,300		$ 5,700