Other Non-Operating Income (Details 1) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Schedule of Non-Operating Income (Expense) [Line Items]
Foreign currency gain (loss), net	$ 3,466	$ (24,084)	$ 5,194	$ (29,527)
(Loss) gain on sales of businesses	0	0	(342)	18,931
Gain on sale of land	0	34,072	0	34,072
Gain on sales of marketable equity securities (see Note 2)	0	4,502	0	6,256
Gain on the formation of a joint venture	0	3,232	0	3,232
Other, net	603	1,278	66	1,132
Total Other Non-Operating Income	$ 4,069	$ 19,000	$ 4,918	$ 34,096