XML 17 R73.htm IDEA: XBRL DOCUMENT v3.19.3
Business Segments and Geographic Information - Narrative (Details)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2019
USD ($)
Sep. 30, 2018
USD ($)
Sep. 30, 2019
USD ($)
segment
Sep. 30, 2018
USD ($)
Dec. 31, 2018
USD ($)
Schedule of Equity Method Investments [Line Items]          
Number of reportable business segments | segment     4    
Equity in earnings of affiliates, net of income tax provision $ 2,228 $ 2,735 $ 6,645 $ 7,071  
Investment in affiliate 0   $ 0   $ 0
SACS          
Schedule of Equity Method Investments [Line Items]          
Ownership percentage in entity     50.00%    
Equity in earnings of affiliates, net of income tax provision 1,200 2,200 $ 3,800 5,900  
Investment in joint venture 10,900   10,900   13,400
Geo Amey          
Schedule of Equity Method Investments [Line Items]          
Equity in earnings of affiliates, net of income tax provision 1,000 $ 600 2,800 $ 1,200  
Investment in affiliate $ 7,300   $ 7,300   $ 4,800