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Other Non-Operating Income (Details 1) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2018
Sep. 30, 2017
Sep. 30, 2018
Sep. 30, 2017
Other Nonoperating Income (Expense) [Abstract]        
Gain on cost method investments $ 8,487 $ 0 $ 8,487 $ 0
Impairment of cost method investments (2,500)   (2,500)  
Impairment of cost method investments   (200)   (200)
Gain (loss) on sales of businesses 916 0 8,157 (342)
Gain on sale of a cost method investment 0 0 2,845 0
Gain on sale of land 0 0 2,542 0
Foreign currency (loss) gain, net (116) 1,414 (2,205) 6,608
Other, net (3,645) 749 (2,664) 815
Total Other Non-Operating Income $ 3,142 $ 1,963 $ 14,662 $ 6,881